水族馆里有鲨鱼么？
它们的外形真像鲨鱼。
Millions and millions of sharks die every year.
每年数百万计的鲨鱼死亡。
With this you'll be allowed to feed the sharks.
这样你就可以喂鲨鱼了。
They didn't see any seals, but they saw some sharks.
他们没有看到海豹，但是他们看到了一些鲨鱼。
Do lions have this problem, too? So do sharks and hippos?
狮子也有这样的问题吗？那么鲨鱼、河马也是吗？
You'll be able to see turtle, lots of clownfish, and some sharks.
你能够看到海龟，许多小丑鱼，还有一些鲨鱼。
Here you will find different kinds of fishes and even some kinds of sharks.
在这里，你会发现不同种类的鱼，甚至几种鲨鱼。
Pelagic sharks are usually caught on the high seas in tuna or swordfish fisheries.
深海鲨鱼通常在公海中被金枪鱼或旗鱼的捕捞渔业捕获。
To most of us sharks are the most dangerous fish in the sea and they attack humans.
对我们大多数人来说，鲨鱼是海里最危险的鱼类，它们攻击人类。
Furthermore, in the early days of longline fishing, a lot of fish were lost to sharks after they had been hooked.
而且早期用延绳钓捕鱼的时候，有许多鱼在上钩后就被鲨鱼吃了。
On the East Coast of the U.S., where large predatory sharks have also been overfished, cownose ray populations have exploded.
位于美国东海岸，大型掠食性鲨鱼也被过度捕捞，牛鼻鳐的数量爆炸式增长。
However, according to Doctor Clark, who has studied the behavior of sharks for twelve years, humans are not normally on the shark's menu.
然而，据研究了12年鲨鱼行为的克拉克博士说，人类通常不在鲨鱼的菜单上。
Local police officer said beachgoers should not feel threatened by sharks because the fish never attack human beings on their own initiative.
当地警察称，沙滩游客无须担心受到鲨鱼的威胁，因为它们从不会主动攻击人类。
Heil mentioned that great white sharks migrated to the east coast of the United States in summer, and this coast is where people gather at sea.
海尔提到夏季大白鲨沿着美国东岸迁移，而这海岸正是人们海上活动聚集的地方。
Great white sharks also attack boats.
大白鲨也攻击船只。
Some people say sharks never get sick but that is not true.
有人说鲨鱼永远不会生病，但事实并非如此。
About three people are killed each year by great white sharks.
每年大约有3人被大白鲨杀死。
It will bring danger to all ocean life if sharks' numbers drop too low.
如果鲨鱼数量下降太多，会给所有海洋生物带来危险。
In fact, around 70 million sharks are caught and traded in this industry every year.
事实上，在这个行业，每年大约有7000万条鲨鱼被捕捞和交易。
Many believe that sharks can never be endangered because they are the strongest in their food chain.
许多人认为鲨鱼永远不会濒临灭绝，因为它们是食物链中最强的。
In order to find fish, the seals have to cross the deep water of the bay—this is where the sharks wait.
为了找到鱼，海豹必须穿过海湾的深水区——这就是鲨鱼等待的地方。
These researchers show that great white sharks are dangerous hunters which will attack anything that looks and acts like a fish.
这些研究人员表明，大白鲨是危险的猎手，它会攻击任何看起来和行为像鱼的东西。
The great white shark is known for its size—the largest sharks can grow to six metres in length and over 2,000 kilograms in weight.
大白鲨以其体型而闻名——最大的白鲨可以长到6米长，超过2000公斤重。
These sharks aren't the ferocious creatures we see in Jaws.
这些鲨鱼并不像我们在《大白鲨》里看到的那样凶残。
If sharks go, the ocean food chain could crumble, experts have warned.
专家警告说如果鲨鱼灭绝的话，海洋食物链将遭到破坏。
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