關於海洋的英文美文欣賞
海洋浩瀚無涯,擁有豐富的資源,爲人類提供了無數的功能與利益。下面是本站小編帶來的關於海洋的英文美文欣賞，歡迎閱讀!
Overfishing Whales and the Environment
過度捕鯨與環境
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，當科學家們在研究遠洋地區生態系統的變化時，他們觀察了處於食物鏈最底層並且在慢慢上升的(生物)變化，比如說食物短缺、海洋環境的變化。然而，最近的一項調查顯示，人們還應該更多的注意(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，在過去的幾十年裏，生活在阿拉斯加西海岸的斑海豹、海狗、海獅和海獺數量極具下降。現在，一項新的調查顯示，所有的這些毀壞都可以歸咎於人類在1946年到1979年期間過度捕撈抹香鯨和鬚鯨。
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，它習慣於捕食抹香鯨和鬚鯨。當虎鯨不能再捕食它們的時候，它就被迫捕食處於更下一層的食物鏈(的生物)。她們先捕食的是最容易捕捉且最有營養價值的海豹。
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 out 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.
接着，當海豹變得稀少後，虎鯨便轉向了海獅。而又當海獅的數量變少後，虎鯨又開始獵殺海獺了。多米諾效應又繼續延伸。沒了海獺約束海膽，海膽的數量變得龐大起來。並且破壞阿拉斯加啊西南部的海藻林生態系統。
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 may affect the food web in unintended ways.
動物間交換食物來源對環境有着很嚴重的影響。而作爲終極捕食者，人類需要好好思考一下他們所做的選擇。(因爲)這些選擇可能會以人們所不知道的方式來影響食物網。
關於海洋的英文美文欣賞篇二Motional Induction
電磁感應
Last time, we talked about "motional induction," a phenomenon by which the ocean generatesa magnetic field.
上次，我們提到過動生電磁感應：海洋產生磁場的一種現象。
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，海洋有無數溶解鹽形式的帶電原子，隨着海洋運動而運動。
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.
在磁場中運動的帶電原子會引起電流，而電流反過來又回形成另一個磁場。這樣海洋應該就形成了自己的磁場。
You said should. How could we know this "motional induction" is happening?
你說“應該”，我們怎麼知道這種動生電磁感應確有其事?
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，華盛頓大學和德國波茲坦的某研究學院研?a href="">咳嗽苯帕品旁詮斕牢佬巧希な島Ｑ蟮拇懦≌媸譴嬖凇?/p>
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，磁力計上的數據讓科學家以爲是地球磁場作用的。而後，他們發現除去這個因素後，仍然有磁場存在。
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生電磁感應讓海洋產生哪種磁場，當然，科學家的推論和衛星上測出的“另一個”磁場吻合。
The satellite also found that magneticintensity over the oceans peaked every twelve and a halfhours, but not over the land. Can you guess why?
衛星還發現，海洋磁場每隔12個半小時就會出現高峯，但是地球磁場不受影響。你能猜到原因嗎?
Every twelve hours... Oh,I get it—tides!
每隔12個半小時?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個半小時潮起潮落，正好和“另一個”磁場高低峯吻合。這正是磁場感應存在的真憑實據，海洋確實有自己獨特的磁力。
關於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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