but they share these waters with a shark twice their size. 不过还有2倍于它的鲨鱼 在和它们一起分享这片水域
but in Southern Africa they're so big they create seas rich enough to support colonies of over a million seals. 不过在南部非洲的大洋流带来的 充足食物能满足百万只海豹的需要
But it doesn't seem to work against the sunflower starfish. 不过好像在向日葵海星面前没有作用
but each urchin has five teeth, which are self sharpening and are replaced every few months. 但是每只海胆有5个锋利的牙齿 而且每隔几个月就换牙
Individually the algae are tiny but together, they produce three quarters of all the oxygen in our atmosphere. 单体藻类虽然很细小 但它们共同产生了我们大气中四分之三的氧气
but nutrients alone can not support life. 但只有养分并不能维持生命
but there's nothing to eat here for his mother. 但在这里他的母亲无法吃到任何东西
but at least, there are no land based predators here. 不过至少没有陆基的捕食者