下載App 希平方
攻其不背
App 開放下載中
下載App 希平方
攻其不背
App 開放下載中
IE版本不足
您的瀏覽器停止支援了😢使用最新 Edge 瀏覽器或點選連結下載 Google Chrome 瀏覽器 前往下載

免費註冊
! 這組帳號已經註冊過了
Email 帳號
密碼請填入 6 位數以上密碼
已經有帳號了?
忘記密碼
! 這組帳號已經註冊過了
您的 Email
請輸入您註冊時填寫的 Email,
我們將會寄送設定新密碼的連結給您。
寄信了!請到信箱打開密碼連結信
密碼信已寄至
沒有收到信嗎?
如果您尚未收到信,請前往垃圾郵件查看,謝謝!

恭喜您註冊成功!

查看會員功能

註冊未完成

《HOPE English 希平方》服務條款關於個人資料收集與使用之規定

隱私權政策
上次更新日期:2014-12-30

希平方 為一英文學習平台,我們每天固定上傳優質且豐富的影片內容,讓您不但能以有趣的方式學習英文,還能增加內涵,豐富知識。我們非常注重您的隱私,以下說明為當您使用我們平台時,我們如何收集、使用、揭露、轉移及儲存你的資料。請您花一些時間熟讀我們的隱私權做法,我們歡迎您的任何疑問或意見,提供我們將產品、服務、內容、廣告做得更好。

本政策涵蓋的內容包括:希平方學英文 如何處理蒐集或收到的個人資料。
本隱私權保護政策只適用於: 希平方學英文 平台,不適用於非 希平方學英文 平台所有或控制的公司,也不適用於非 希平方學英文 僱用或管理之人。

個人資料的收集與使用
當您註冊 希平方學英文 平台時,我們會詢問您姓名、電子郵件、出生日期、職位、行業及個人興趣等資料。在您註冊完 希平方學英文 帳號並登入我們的服務後,我們就能辨認您的身分,讓您使用更完整的服務,或參加相關宣傳、優惠及贈獎活動。希平方學英文 也可能從商業夥伴或其他公司處取得您的個人資料,並將這些資料與 希平方學英文 所擁有的您的個人資料相結合。

我們所收集的個人資料, 將用於通知您有關 希平方學英文 最新產品公告、軟體更新,以及即將發生的事件,也可用以協助改進我們的服務。

我們也可能使用個人資料為內部用途。例如:稽核、資料分析、研究等,以改進 希平方公司 產品、服務及客戶溝通。

瀏覽資料的收集與使用
希平方學英文 自動接收並記錄您電腦和瀏覽器上的資料,包括 IP 位址、希平方學英文 cookie 中的資料、軟體和硬體屬性以及您瀏覽的網頁紀錄。

隱私權政策修訂
我們會不定時修正與變更《隱私權政策》,不會在未經您明確同意的情況下,縮減本《隱私權政策》賦予您的權利。隱私權政策變更時一律會在本頁發佈;如果屬於重大變更,我們會提供更明顯的通知 (包括某些服務會以電子郵件通知隱私權政策的變更)。我們還會將本《隱私權政策》的舊版加以封存,方便您回顧。

服務條款
歡迎您加入看 ”希平方學英文”
上次更新日期:2013-09-09

歡迎您加入看 ”希平方學英文”
感謝您使用我們的產品和服務(以下簡稱「本服務」),本服務是由 希平方學英文 所提供。
本服務條款訂立的目的,是為了保護會員以及所有使用者(以下稱會員)的權益,並構成會員與本服務提供者之間的契約,在使用者完成註冊手續前,應詳細閱讀本服務條款之全部條文,一旦您按下「註冊」按鈕,即表示您已知悉、並完全同意本服務條款的所有約定。如您是法律上之無行為能力人或限制行為能力人(如未滿二十歲之未成年人),則您在加入會員前,請將本服務條款交由您的法定代理人(如父母、輔助人或監護人)閱讀,並得到其同意,您才可註冊及使用 希平方學英文 所提供之會員服務。當您開始使用 希平方學英文 所提供之會員服務時,則表示您的法定代理人(如父母、輔助人或監護人)已經閱讀、了解並同意本服務條款。 我們可能會修改本條款或適用於本服務之任何額外條款,以(例如)反映法律之變更或本服務之變動。您應定期查閱本條款內容。這些條款如有修訂,我們會在本網頁發佈通知。變更不會回溯適用,並將於公布變更起十四天或更長時間後方始生效。不過,針對本服務新功能的變更,或基於法律理由而為之變更,將立即生效。如果您不同意本服務之修訂條款,則請停止使用該本服務。

第三人網站的連結 本服務或協力廠商可能會提供連結至其他網站或網路資源的連結。您可能會因此連結至其他業者經營的網站,但不表示希平方學英文與該等業者有任何關係。其他業者經營的網站均由各該業者自行負責,不屬希平方學英文控制及負責範圍之內。

兒童及青少年之保護 兒童及青少年上網已經成為無可避免之趨勢,使用網際網路獲取知識更可以培養子女的成熟度與競爭能力。然而網路上的確存有不適宜兒童及青少年接受的訊息,例如色情與暴力的訊息,兒童及青少年有可能因此受到心靈與肉體上的傷害。因此,為確保兒童及青少年使用網路的安全,並避免隱私權受到侵犯,家長(或監護人)應先檢閱各該網站是否有保護個人資料的「隱私權政策」,再決定是否同意提出相關的個人資料;並應持續叮嚀兒童及青少年不可洩漏自己或家人的任何資料(包括姓名、地址、電話、電子郵件信箱、照片、信用卡號等)給任何人。

為了維護 希平方學英文 網站安全,我們需要您的協助:

您承諾絕不為任何非法目的或以任何非法方式使用本服務,並承諾遵守中華民國相關法規及一切使用網際網路之國際慣例。您若係中華民國以外之使用者,並同意遵守所屬國家或地域之法令。您同意並保證不得利用本服務從事侵害他人權益或違法之行為,包括但不限於:
A. 侵害他人名譽、隱私權、營業秘密、商標權、著作權、專利權、其他智慧財產權及其他權利;
B. 違反依法律或契約所應負之保密義務;
C. 冒用他人名義使用本服務;
D. 上載、張貼、傳輸或散佈任何含有電腦病毒或任何對電腦軟、硬體產生中斷、破壞或限制功能之程式碼之資料;
E. 干擾或中斷本服務或伺服器或連結本服務之網路,或不遵守連結至本服務之相關需求、程序、政策或規則等,包括但不限於:使用任何設備、軟體或刻意規避看 希平方學英文 - 看 YouTube 學英文 之排除自動搜尋之標頭 (robot exclusion headers);

服務中斷或暫停
本公司將以合理之方式及技術,維護會員服務之正常運作,但有時仍會有無法預期的因素導致服務中斷或故障等現象,可能將造成您使用上的不便、資料喪失、錯誤、遭人篡改或其他經濟上損失等情形。建議您於使用本服務時宜自行採取防護措施。 希平方學英文 對於您因使用(或無法使用)本服務而造成的損害,除故意或重大過失外,不負任何賠償責任。

版權宣告
上次更新日期:2013-09-16

希平方學英文 內所有資料之著作權、所有權與智慧財產權,包括翻譯內容、程式與軟體均為 希平方學英文 所有,須經希平方學英文同意合法才得以使用。
希平方學英文歡迎你分享網站連結、單字、片語、佳句,使用時須標明出處,並遵守下列原則:

  • 禁止用於獲取個人或團體利益,或從事未經 希平方學英文 事前授權的商業行為
  • 禁止用於政黨或政治宣傳,或暗示有支持某位候選人
  • 禁止用於非希平方學英文認可的產品或政策建議
  • 禁止公佈或傳送任何誹謗、侮辱、具威脅性、攻擊性、不雅、猥褻、不實、色情、暴力、違反公共秩序或善良風俗或其他不法之文字、圖片或任何形式的檔案
  • 禁止侵害或毀損希平方學英文或他人名譽、隱私權、營業秘密、商標權、著作權、專利權、其他智慧財產權及其他權利、違反法律或契約所應付支保密義務
  • 嚴禁謊稱希平方學英文辦公室、職員、代理人或發言人的言論背書,或作為募款的用途

網站連結
歡迎您分享 希平方學英文 網站連結,與您的朋友一起學習英文。

抱歉傳送失敗!

不明原因問題造成傳送失敗,請儘速與我們聯繫!
希平方 x ICRT

「Edith Widder:海底世界的發光生物」- Glowing Life in an Underwater World

觀看次數:3238  • 

框選或點兩下字幕可以直接查字典喔!

In the spirit of Jacques Cousteau, who said, "People protect what they love," I want to share with you today what I love most in the ocean, and that's the incredible number and variety of animals in it that make light.

My addiction began with this strange looking diving suit called Wasp; that's not an acronym—just somebody thought it looked like the insect. It was actually developed for use by the offshore oil industry for diving on oil rigs down to a depth of 2,000 feet. Right after I completed my Ph.D., I was lucky enough to be included with a group of scientists that was using it for the first time as a tool for ocean exploration. We trained in a tank in Port Hueneme, and then my first open ocean dive was in Santa Barbara Channel. It was an evening dive. I went down to a depth of 880 feet and turned out the lights. And the reason I turned out the lights is because I knew I would see this phenomenon of animals making light called bioluminescence. But I was totally unprepared for how much there was and how spectacular it was. I saw chains of jellyfish called siphonophores that were longer than this room, pumping out so much light that I could read the dials and gauges inside the suit without a flashlight; and puffs and billows of what looked like luminous blue smoke; and explosions of sparks that would swirl up out of the thrusters—just like when you throw a log on a campfire and the embers swirl up off the campfire, but these were icy blue embers. It was breathtaking.

Now, usually if people are familiar with bioluminescence at all, it's these guys; it's fireflies. And there are a few other land-dwellers that can make light—some insects, earthworms, fungi—but in general, on land, it's really rare. In the ocean, it's the rule rather than the exception. If I go out in the open ocean environment, virtually anywhere in the world, and I drag a net from 3,000 feet to the surface, most of the animals—in fact, in many places, 80 to 90 percent of the animals that I bring up in that net—make light. This makes for some pretty spectacular light shows.

Now I want to share with you a little video that I shot from a submersible. I first developed this technique working from a little single-person submersible called Deep Rover and then adapted it for use on the Johnson Sea-Link, which you see here. So, mounted in front of the observation sphere, there's a a three-foot diameter hoop with a screen stretched across it. And inside the sphere with me is an intensified camera that's about as sensitive as a fully dark-adapted human eye, albeit a little fuzzy. So you turn on the camera, turn out the lights. That sparkle you're seeing is not luminescence, that's just electronic noise on these super intensified cameras. You don't see luminescence until the submersible begins to move forward through the water, but as it does, animals bumping into the screen are stimulated to bioluminesce.

Now, when I was first doing this, all I was trying to do was count the numbers of sources. I knew my forward speed, I knew the area, and so I could figure out how many hundreds of sources there were per cubic meter. But I started to realize that I could actually identify animals by the type of flashes they produced. And so, here, in the Gulf of Maine at 740 feet, I can name pretty much everything you're seeing there to the species level. Like those big explosions, sparks, are from a little comb jelly, and there's krill and other kinds of crustaceans, and jellyfish. There was another one of those comb jellies. And so I've worked with computer image analysis engineers to develop automatic recognition systems that can identify these animals and then extract the XYZ coordinate of the initial impact point. And we can then do the kinds of things that ecologists do on land, and do nearest neighbor distances.

But you don't always have to go down to the depths of the ocean to see a light show like this. You can actually see it in surface waters. This is some shot, by Dr. Mike Latz at Scripps Institution, of a dolphin swimming through bioluminescent plankton. And this isn't someplace exotic like one of the bioluminescent bays in Puerto Rico, this was actually shot in San Diego Harbor. And sometimes you can see it even closer than that, because the heads on ships—that's toilets, for any land lovers that are listening—are flushed with unfiltered seawater that often has bioluminescent plankton in it. So, if you stagger into the head late at night and you're so toilet-hugging sick that you forget to turn on the light, you may think that you're having a religious experience.

So, how does a living creature make light? Well, that was the question that 19th century French physiologist Raphael Dubois, asked about this bioluminescent clam. He ground it up and he managed to get out a couple of chemicals; one, the enzyme, he called luciferase; the substrate, he called luciferin after Lucifer the Lightbearer. That terminology has stuck, but it doesn't actually refer to specific chemicals because these chemicals come in a lot of different shapes and forms. In fact, most of the people studying bioluminescence today are focused on the chemistry, because these chemicals have proved so incredibly valuable for developing antibacterial agents, cancer fighting drugs, testing for the presence of life on Mars, detecting pollutants in our waters—which is how we use it at ORCA. In 2008, the Nobel Prize in Chemistry was awarded for work done on a molecule called green fluorescent protein that was isolated from the bioluminescent chemistry of a jellyfish, and it's been equated to the invention of the microscope, in terms of the impact that it has had on cell biology and genetic engineering.

Another thing all these molecules are telling us is that, apparently, bioluminescence has evolved at least 40 times, maybe as many as 50 separate times in evolutionary history, which is a clear indication of how spectacularly important this trait is for survival. So, what is it about bioluminescence that's so important to so many animals? Well, for animals that are trying to avoid predators by staying in the darkness, light can still be very useful for the three basic things that animals have to do to survive, and that's find food, attract a mate and avoid being eaten. So, for example, this fish has a built-in headlight behind its eye that it can use for finding food or attracting a mate. And then when it's not using it, it actually can roll it down into its head just like the headlights on your Lamborghini. This fish actually has high beams.

And this fish, which is one of my favorites, has three headlights on each side of its head. Now, this one is blue, and that's the color of most bioluminescence in the ocean because evolution has selected for the color that travels farthest through seawater in order to optimize communication. So, most animals make blue light, and most animals can only see blue light, but this fish is a really fascinating exception because it has two red light organs. And I have no idea why there's two, and that's something I want to solve some day—but not only can it see blue light, but it can see red light. So it uses its red bioluminescence like a sniper's scope to be able to sneak up on animals that are blind to red light and be able to see them without being seen. It's also got a little chin barbel here with a blue luminescent lure on it that it can use to attract prey from a long way off. And a lot of animals will use their bioluminescence as a lure.

This is another one of my favorite fish. This is a viperfish. And it's got a lure on the end of a long fishing rod that it arches in front of the toothy jaw that gives the viperfish its name. The teeth on this fish are so long that if they closed inside the mouth of the fish, it would actually impale its own brain. So instead, it slides in grooves on the outside of the head. This is a Christmas tree of a fish; everything on this fish lights up, it's not just that lure. It's got a built-in flashlight. It's got these jewel-like light organs on its belly that it uses for a type of camouflage that obliterates its shadow, so when it's swimming around and there's a predator looking up from below, it makes itself disappear. It's got light organs in the mouth, it's got light organs in every single scale, in the fins, in a mucus layer on the back and the belly, all used for different things—some of which we know about, some of which we don't.

And we know a little bit more about bioluminescence thanks to Pixar, and I'm very grateful to Pixar for sharing my favorite topic with so many people. I do wish, with their budget, that they might have spent just a tiny bit more money to pay a consulting fee to some poor, starving graduate student, who could have told them that those are the eyes of a fish that's been preserved in formalin. These are the eyes of a living anglerfish. So, she's got a lure that she sticks out in front of this living mousetrap of needle-sharp teeth in order to attract in some unsuspecting prey. And this one has a lure with all kinds of little interesting threads coming off it.

Now we used to think that the different shape of the lure was to attract different types of prey, but then stomach content analyses on these fish done by scientists, or more likely their graduate students, have revealed that they all eat pretty much the same thing. So, now we believe that the different shape of the lure is how the male recognizes the female in the anglerfish world, because many of these males are what are known as dwarf males. This little guy has no visible means of self-support. He has no lure for attracting food and no teeth for eating it when it gets there. His only hope for existence on this planet is as a gigolo. He's got to find himself a babe and then he's got to latch on for life. So this little guy has found himself this babe, and you will note that he's had the good sense to attach himself in a way that he doesn't actually have to look at her. But he still knows a good thing when he sees it, and so he seals the relationship with an eternal kiss. His flesh fuses with her flesh, her bloodstream grows into his body, and he becomes nothing more than a little sperm sac. Well, this is a deep-sea version of Women's Lib. She always knows where he is, and she doesn't have to be monogamous, because some of these females come up with multiple males attached.

So they can use it for finding food, for attracting mates. They use it a lot for defense, many different ways. A lot of them can release their luciferin or luferase in the water just the way a squid or an octopus will release an ink cloud. This shrimp is actually spewing light out of its mouth like a fire breathing dragon in order to blind or distract this viperfish so that the shrimp can swim away into the darkness. And there are a lot of different animals that can do this: There's jellyfish, there's squid, there's a whole lot of different crustaceans, there's even fish that can do this. This fish is called the shining tubeshoulder because it actually has a tube on its shoulder that can squirt out light. And I was lucky enough to capture one of these when we were on a trawling expedition off the northwest coast of Africa for "Blue Planet," for the deep portion of "Blue Planet." And we were using a special trawling net that we were able to bring these animals up alive. So we captured one of these, and I brought it into the lab. So I'm holding it, and I'm about to touch that tube on its shoulder, and when I do, you'll see bioluminescence coming out. But to me, what's shocking is not just the amount of light, but the fact that it's not just luciferin and luciferase. For this fish, it's actually whole cells with nuclei and membranes. It's energetically very costly for this fish to do this, and we have no idea why it does it—another one of these great mysteries that needs to be solved.

Now, another form of defense is something called a burglar alarm, same reason you have a burglar alarm on your car; the honking horn and flashing lights are meant to attract the attention of, hopefully, the police that will come and take the burglar away, when an animal's caught in the clutches of a predator, its only hope for escape may be to attract the attention of something bigger and nastier that will attack their attacker, thereby affording them a chance for escape. This jellyfish, for example, has a spectacular bioluminescent display. This is us chasing it in the submersible. That's not luminescence, that's reflected light from the gonads. We capture it in a very special device on the front of the submersible that allows us to bring it up in really pristine condition, bring it into the lab on the ship, and then to generate the display you're about to see. All I did was touch it once per second on its nerve ring with a sharp pick that's sort of like the sharp tooth of a fish. And once this display gets going, I'm not touching it anymore. This is an unbelievable light show. It's this pinwheel of light, and I've done calculations that show that this could be seen from as much as 300 feet away by a predator. And I thought, "You know, that might actually make a pretty good lure." Because one of the things that's frustrated me as a deep-sea explorer is how many animals there probably are in the ocean that we know nothing about because of the way we explore the ocean.

The primary way that we know about what lives in the ocean is we go out and drag nets behind ships. And I defy you to name any other branch of science that still depends on hundreds of year-old technology. The other primary way is we go down with submersibles and remote-operated vehicles. I've made hundreds of dives in submersibles. When I'm sitting in a submersible though, I know that I'm not unobtrusive at all—I've got bright lights and noisy thrusters—any animal with any sense is going to be long gone. So, I've wanted for a long time to figure out a different way to explore.

And so, some time ago, I got this idea for a camera system. It's not exactly rocket science. We call this thing Eye-in-the-Sea. And scientists have done this on land for years; we just use a color that the animals can't see and then a camera that can see that color. You can't use infrared in the sea. We use far-red light, but even that's a problem because it gets absorbed so quickly. Made an intensified camera, wanted to make this electronic jellyfish. Thing is, in science, you basically have to tell the funding agencies what you're going to discover before they'll give you the money. And I didn't know what I was going to discover, so I couldn't get the funding for this. So I kluged this together, I got the Harvey Mudd Engineering Clinic to actually do it as an undergraduate student project initially, and then I kluged funding from a whole bunch of different sources.

Monterey Bay Aquarium Research Institute gave me time with their ROV so that I could test it and we could figure out, you know, for example, which colors of red light we had to use so that we could see the animals, but they couldn't see us—get the electronic jellyfish working. And you can see just what a shoestring operation this really was, because we cast these 16 blue LEDs in epoxy and you can see in the epoxy mold that we used, the word Ziploc is still visible. Needless to say, when it's kluged together like this, there were a lot of trials and tribulations getting this working. But there came a moment when it all came together, and everything worked. And, remarkably, that moment got caught on film by photographer Mark Richards, who happened to be there at the precise moment that we discovered that it all came together. That's me on the left, my graduate student at the time, Erika Raymond, and Lee Fry, who was the engineer on the project. And we have this photograph posted in our lab in a place of honor with the caption: "Engineer satisfying two women at once." And we were very, very happy.

So now we had a system that we could actually take to some place that was kind of like an oasis on the bottom of the ocean that might be patrolled by large predators. And so, the place that we took it to was this place called a Brine Pool, which is in the northern part of the Gulf of Mexico. It's a magical place. And I know this footage isn't going to look like anything to you—we had a crummy camera at the time—but I was ecstatic. We're at the edge of the Brine Pool, there's a fish that's swimming towards the camera. It's clearly undisturbed by us. And I had my window into the deep sea. I, for the first time, could see what animals were doing down there when we weren't down there disturbing them in some way. Four hours into the deployment, we had programmed the electronic jellyfish to come on for the first time. Eighty-six seconds after it went into its pinwheel display, we recorded this: This is a squid over six feet long that is so new to science it cannot be placed in any known scientific family. I could not have asked for a better proof of concept.

And based on this, I went back to the National Science Foundation and said, "This is what we will discover." And they gave me enough money to do it right, which has involved developing the world's first deep-sea webcam—which has been installed in the Monterey Canyon for the past year—and now, more recently, a modular form of this system, a much more mobile form that's a lot easier to launch and recover, that I hope can be used on Sylvia's "hope spots" to help explore and protect these areas, and, for me, learn more about the bioluminescence in these "hope spots."

So one of these take-home messages here is, there is still a lot to explore in the oceans. And Sylvia has said that we are destroying the oceans before we even know what's in them, and she's right. So if you ever, ever get an opportunity to take a dive in a submersible, say yes—a thousand times, yes—and please turn out the lights. I promise, you'll love it.

Thank you.

播放本句

登入使用學習功能

使用Email登入

HOPE English 播放器使用小提示

  • 功能簡介

    單句重覆、重複上一句、重複下一句:以句子為單位重覆播放,單句重覆鍵顯示綠色時為重覆播放狀態;顯示白色時為正常播放狀態。按重複上一句、重複下一句時就會自動重覆播放該句。
    收錄佳句:點擊可增減想收藏的句子。

    中、英文字幕開關:中、英文字幕按鍵為綠色為開啟,灰色為關閉。鼓勵大家搞懂每一句的內容以後,關上字幕聽聽看,會發現自己好像在聽中文說故事一樣,會很有成就感喔!
    收錄單字:框選英文單字可以收藏不會的單字。
  • 分享
    如果您有收錄很優秀的句子時,可以分享佳句給大家,一同看佳句學英文!