Meanwhile, without scorning these theories, the Nautilus's crew captured half a dozen manatees.

然而，尽管明了这些道理，“鹦鹉螺号”船上的人还是捕捉了6只海牛。

So far, the effort has provided the manatees with more than 25 tons of lettuce.

到目前为止，这项努力已经为海牛提供了超过25吨生菜。

The environmental changes could threaten native animals including manatees and capybaras.

该环境变化可能威胁到包括海牛和水豚在内的本土动物。

During the coldest spells, more than 300 manatees can gather here.

在最冷的一段时间里，300多只海牛都聚集在这里。

The manatees let themselves be struck down without offering any resistance.

因为这些海牛面对捕捉丝毫不做反抗。

I hope you enjoyed learning about manatees today.

希望你们喜欢今天关于海牛的介绍。

That's what manatees sound like when they're communicating in the warm, shallow waters around Florida.

这是佛罗里达州附近温暖的浅水地区的海牛交流声音。

It's actually an artificial version of the natural hot springs where manatees traditionally congregate.

这其实是一种人工的天然温泉，而海牛则一直喜欢在温泉聚集。

" We are adjusting our program to get as much food to manatees as we can" .

" 我们正在调整我们的计划，以便尽可能多地为海牛提供食物。"

When the algae die they release toxins that have killed fish, sea turtles, manatees and other animals.

海藻死亡后释放出的毒素，可以杀死鱼类、海龟、海牛和其它动物。