当一只底栖鱼逃离隐藏的地点时，不会马上再找个地方藏身，而是会游上几米。
After a fish emerges from its hiding spot, it swims a few meters away and doesn't immediately rebury itself.
趁着这个间隙，海豚会丢掉嘴中的海绵，浮出海面换气，接着马上潜入水里捕捉这些长度只有12 cm的底栖鱼。
That interlude gives the dolphin just enough time to drop its sponge, surface to get a breath, and dive again to snag the fish, most of which are about 12 centimeters in length.
一亿两千万年前，白垩纪的海洋覆盖着现在的澳大利亚南部，一条鱼龙（注：一种类似鱼和海豚的大型海栖爬行动物）经历了十分糟糕的一天。
One hundred and twenty million years ago, when a Cretaceous sea covered what is now South Australia, an ichthyosaur had a really bad day.
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