She knows she needs to herd the prey into a tight group... 雌虎鲸明白它需要将猎物驱赶到一起
And he knows the caiman's most vulnerable point... 而且他知道凯门鳄最脆弱的部位
She knows something's not quite right, 她知道事情有点不太对劲
No one knows why the creatures here are so small 没人知道为什么这里的动物这么小
Two million are thought to live here, but no one really knows. 共约两百万只瞪羚生活在此处 但具体数量仍不得知
a smart ibex knows that the best thing to do is to gain higher ground. 聪明的羱羊很清楚 最好的战术就是占领制高点
who knows how many Lechuguillas are still waiting to be discovered? 谁知道还会有多少个龙舌兰洞 等着人们去发现呢
but still nobody yet knows the true extend of this subterranean waterworld. 但仍旧无人知晓 这个地下水世界究竟有多大