- he's learnt to dive for his dinner.
它学会了潜水捕猎 - 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 - and the cubs have lots to learn.
熊崽们还要很多东西要学 - The annual arrival of spawning salmon
鲑鱼每年都会到河里产卵 - brings huge quantities of food into these high rivers that normally struggle to support much life.
于是这些平常只能勉强维持众多动物生计的 高山河流终于有了提供饕餮大餐的机会 - Although relatively lifeless, the power of the upland rivers to shape the landscape
尽管高山河流的生物量相对较少 它们却有能力改变地形 - 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
The annual arrival of spawning salmon 鲑鱼每年都会到河里产卵
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