易混淆的单词： Whales

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Tells a story about whales " jumping . "

还讲了一个鲸鱼“跳跃”的故事。

Both whales and dolphins literally fall half asleep .

其实鲸鱼和海豚只是半睡状态。

Other body parts of early whales also changed .

早期鲸鱼的其它部位也发生了变化。

Killer whales may also be a problem .

虎头鲸也是它们的一个敌人。

After decades of being hunted , the whales finally received protection in 1966 .

在被猎杀数十年后，蓝鲸终于在1966年受到了保护。