This is the very first place that trees can grow. 这也是树木长到的最北处
Add sunshine and the mix is spectacularly productive. 再加上阳光,这种组合的产生了大量的养分
In the far north, winter is over at last 在遥远的北方 寒冬终于过去
The Aleutian Island chain running west from Alaska is the gateway to the Bearing Sea. 阿拉斯加(美国)西部的 阿留申群岛是通向白令海的大门
The only safe way to grab a penguin is from behind, and the birds are well aware of that. 唯一的方法就是从背后抓住企鹅 不过企鹅也很清楚这一点.
and that is patrolled by great whites. 大白鲨就在那里逡巡
Each seal is indeed swimming for it's life. 每只海豹必须拼命游泳
The great white's turn of speed is powered by a high metabolism. 大白鲨的速度和力量来自体内高速的新陈代谢