水族馆里有鲨鱼么？
它们的外形真像鲨鱼。
Great white sharks are meat eaters.
大白鲨是肉食动物。
他们有鲨鱼吗？
Let me tell you something about sharks.
让我告诉你一些关于鲨鱼的事情。
帮忙拯救鲨鱼吧！
We found the sharks and saw the dolphins.
我们发现了鲨鱼，看到了海豚。
Great white sharks are very good hunters.
大白鲨是很好的猎手。
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。
Great white sharks clearly prefer fish to humans.
大白鲨显然更喜欢鱼而不是人。
The number of sharks in the world is dropping fast.
世界上鲨鱼的数量正在迅速减少。
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。
At high speeds the sharks can't tell the difference.
在高速下，鲨鱼分辨不出其中的区别。
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。
Great white sharks also attack boats.
大白鲨也攻击船只。
About three people are killed each year by great white sharks.
每年大约有3人被大白鲨杀死。
保护鲨鱼很酷！
But we made a commitment to protect sharks.
但是我们许下了承诺要保护鲨鱼。
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。
If sharks die off, you could have a food chain Whac-a-Mole, scientists say.
科学家说，如果鲨鱼灭绝，就会象“打地鼠”游戏一样引发食物链的崩溃。
Great white sharks cannot stop swimming; if they do, they suffocate and die.
大白鲨不能停止游泳。一旦停下，就会窒息而死。
These "living fossils" branched off from sharks about 400 million years ago.
这些“活化石”在大约4亿年前从鲨鱼中分化出来。
However scary sharks may seem, they are a vital part of the ocean's ecosystems.
不论鲨鱼看起来多么恐怖，它们都是海洋生态系统中重要的一部分。
Oliver and his team observed the sharks at the site for an incredible 1,230 hours.
奥利佛和他的团队在这个地方观察鲨鱼长达令人惊叹的1230个小时。
LARGE sharks, such as the Great White and Tiger, generally prey on big Marine mammals.
体型较大的鲨鱼，比如大白鲨和虎鲨，一般以大个头的海洋哺乳动物为食。
LARGE sharks, such as the Great White and Tiger, generally prey on big Marine mammals.
体型较大的鲨鱼，比如大白鲨和虎鲨，一般以大个头的海洋哺乳动物为食。
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