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And shadowing them...
而紧随他们身后的是
..Africa's biggest predator.
非洲最大的食肉动物
A Bryde's whale.
布氏鲸
This female is 15 metres long
这条雌鲸有15米长
and weighs more than a whole family of elephants.
比一个大象家族还重
The dolphins are in pursuit of sardines - millions of them.
海豚们正在追逐上百万条的 沙丁鱼
But these cold-water fish
但这些冷水鱼
are heading towards an impenetrable barrier of warm water
正在朝一道他们无法穿过的
that they will not cross, the Agulhas Current.
暖水流前进 即厄加勒斯暖洋流
They're trapped.
他们被困住了
And that gives the whale her chance.
这就让鲸鱼有了可趁之机
But the sardines are so speedy
但沙丁鱼游得很快
that the whale only catches a few with each pass.
庞大的鲸鱼每次出击只能吃到几条
