This is one of the largest concentrations of Nile crocodiles in Africa, 这里是非洲一处最大的尼罗鳄聚集地
there is real strength in numbers. 群体合作能保证它们屡战屡胜
is greater than any other stage in a river's life. 在河流扮演的角色中 这才是最主要的
But catching salmon in deep water is not that easy 但要想在深水中捕获鲑鱼可不太容易
detect the slightest changes in water pressure. 能觉察出最轻微的水压变化
But with the spring melt here in Japan 可是在日本 每当春雪消融之际
They're the only large predator in these icy waters. 它们是这些冰水中唯一的大型掠食动物