關(guān)于海洋的英文美文欣賞
海洋浩瀚無(wú)涯,擁有豐富的資源,為人類提供了無(wú)數(shù)的功能與利益。下面是學(xué)習(xí)啦小編帶來(lái)的關(guān)于海洋的英文美文欣賞，歡迎閱讀!
關(guān)于海洋的英文美文欣賞篇一
Overfishing Whales and the Environment
過(guò)度捕鯨與環(huán)境
Until recently, when scientists studied changes in open-ocean ecosystems, they looked atchanges in the bottom of the food chain that gradually make their way to the top, like foodshortages and shifts in the ocean environment. A recent study, however, suggests that moreattention needs to be given to top-down influences as well.
直到最近，當(dāng)科學(xué)家們?cè)谘芯窟h(yuǎn)洋地區(qū)生態(tài)系統(tǒng)的變化時(shí)，他們觀察了處于食物鏈最底層并且在慢慢上升的(生物)變化，比如說(shuō)食物短缺、海洋環(huán)境的變化。然而，最近的一項(xiàng)調(diào)查顯示，人們還應(yīng)該更多的注意(食物鏈)自上而下的影響。
For example, over the past few decades, there's been a major collapse of the populations ofharbor seals, fur seals, sea lions, and sea otters living on the coasts of western Alaska. Now anew study suggests that all this destruction can be traced back to humans overfishing spermand baleen whales between 1946 and 1979.
比方說(shuō)，在過(guò)去的幾十年里，生活在阿拉斯加西海岸的斑海豹、海狗、海獅和海獺數(shù)量極具下降?，F(xiàn)在，一項(xiàng)新的調(diào)查顯示，所有的這些毀壞都可以歸咎于人類在1946年到1979年期間過(guò)度捕撈抹香鯨和須鯨。
Killer whales, who live at the top of the ocean food chain, used to prey on sperm and baleenwhales. When these were no longer available, the killer whales were forced to fish farther downthe food chain. First they fed on seals, which were the easiest to catch and the mostnutritionally valuable.
虎鯨是在海洋食物鏈的最高層，它習(xí)慣于捕食抹香鯨和須鯨。當(dāng)虎鯨不能再捕食它們的時(shí)候，它就被迫捕食處于更下一層的食物鏈(的生物)。她們先捕食的是最容易捕捉且最有營(yíng)養(yǎng)價(jià)值的海豹。
Then, when seals became rare, the killer whales turned to sea lions. When the sea lionpopulation crashed, they started fishing sea otters. The domino effect reaches even farther.Without sea otters keeping sea urchins in check, their population has exploded. And they'vedestroyed the kelp forests, and with it, the kelp forest ecosystem in southwestern Alaska.
接著，當(dāng)海豹變得稀少后，虎鯨便轉(zhuǎn)向了海獅。而又當(dāng)海獅的數(shù)量變少后，虎鯨又開(kāi)始獵殺海獺了。多米諾效應(yīng)又繼續(xù)延伸。沒(méi)了海獺約束海膽，海膽的數(shù)量變得龐大起來(lái)。并且破壞阿拉斯加啊西南部的海藻林生態(tài)系統(tǒng)。
Animals switching food sources can have a very serious effect on the environment. And thatwe humans, as the ultimate predators, need to give a lot of thought to the choices we make.They may affect the food web in unintended ways.
動(dòng)物間交換食物來(lái)源對(duì)環(huán)境有著很?chē)?yán)重的影響。而作為終極捕食者，人類需要好好思考一下他們所做的選擇。(因?yàn)?這些選擇可能會(huì)以人們所不知道的方式來(lái)影響食物網(wǎng)。
關(guān)于海洋的英文美文欣賞篇二
Motional Induction
電磁感應(yīng)
Last time, we talked about "motional induction," a phenomenon by which the ocean generatesa magnetic field.
上次，我們提到過(guò)動(dòng)生電磁感應(yīng)：海洋產(chǎn)生磁場(chǎng)的一種現(xiàn)象。
It works like this: earth has its own magnetic field. The ocean has plenty of charged atoms init, in the form of dissolved salt. These atoms are in motion because the ocean flows.
地球有自己的磁場(chǎng)，海洋有無(wú)數(shù)溶解鹽形式的帶電原子，隨著海洋運(yùn)動(dòng)而運(yùn)動(dòng)。
Charged atoms moving through a magnetic field will induce an electric current. And an electriccurrent will, in turn, create another magnetic field. The ocean should generate its ownmagnetic field.
在磁場(chǎng)中運(yùn)動(dòng)的帶電原子會(huì)引起電流，而電流反過(guò)來(lái)又回形成另一個(gè)磁場(chǎng)。這樣海洋應(yīng)該就形成了自己的磁場(chǎng)。
You said should. How could we know this "motional induction" is happening?
你說(shuō)“應(yīng)該”，我們?cè)趺粗肋@種動(dòng)生電磁感應(yīng)確有其事?
Direct evidence came in 2003 from scientists working at the University of Washington and aresearch institute in Potsdam, Germany. These researchers used a magnetometer on board anorbiting satellite.
直到2003年，華盛頓大學(xué)和德國(guó)波茲坦的某研究學(xué)院研究人員將磁力計(jì)放在軌道衛(wèi)星上，證實(shí)海洋的磁場(chǎng)真是存在。
First, they figured out what the magnetic field of the planet should be. After subtracting thisfigure, they found there was still some leftover magnetic field.
最初，磁力計(jì)上的數(shù)據(jù)讓科學(xué)家以為是地球磁場(chǎng)作用的。而后，他們發(fā)現(xiàn)除去這個(gè)因素后，仍然有磁場(chǎng)存在。
Next, the team made a computer model of what kind of magnetic field the ocean shouldgenerate through motional induction. Sure enough, their prediction matched the excessmagnetic field measured by the satellite.
研究人員又電腦模擬在動(dòng)生電磁感應(yīng)讓海洋產(chǎn)生哪種磁場(chǎng)，當(dāng)然，科學(xué)家的推論和衛(wèi)星上測(cè)出的“另一個(gè)”磁場(chǎng)吻合。
The satellite also found that magneticintensity over the oceans peaked every twelve and a halfhours, but not over the land. Can you guess why?
衛(wèi)星還發(fā)現(xiàn)，海洋磁場(chǎng)每隔12個(gè)半小時(shí)就會(huì)出現(xiàn)高峰，但是地球磁場(chǎng)不受影響。你能猜到原因嗎?
Every twelve hours... Oh,I get it—tides!
每隔12個(gè)半小時(shí)?我知道了!答案是潮汐。
Exactly right! The tides rise and fall every twelve and half hours, just as that extra magneticenergy swells and diminishes. This is very strong evidence that motional induction is real... andthe ocean has its own magnetism.
完全正確!潮汐每隔12個(gè)半小時(shí)潮起潮落，正好和“另一個(gè)”磁場(chǎng)高低峰吻合。這正是磁場(chǎng)感應(yīng)存在的真憑實(shí)據(jù)，海洋確實(shí)有自己獨(dú)特的磁力。
關(guān)于海洋的英文美文欣賞篇三
A long time ago, and has a small drop of water in the east china sea listening to the story of the east china sea grandpa stresses. it is aware of the east china sea using miles apart, can not be described in a vast sea, with 1000 960 high enough to describe the depth of the sea. it is very envious of the east china sea. Therefore, it asked the East China Sea grandfather: "grandpa east.
Why then has the vast East China Sea so deep? "East grandfather told it:" I also another little drop of water, I and many partners around the clock to muddy pool together a small partnership, it becomes a small stream. But we do not stop pace, the United States is continuing to pour forward, and then became rivers. Finally many rivers come together; it becomes a sea, the formation of the East China Sea. "Small drop asked: "we really have so much power? Can be turned into a stream, into a river into the sea? "East grandpa replied: "of course not! Can not become small rivers flow, so you can become the sea. Also, into the sea, do not forget the existence of small water droplets, not to overlook the power of small water droplets, but it is the source of our life! Without it, we would not. "Small drop in the east china sea remember his grandfather, finally became the famous South China Sea.
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