評論
打印
A grizzly bear. From famine to feast, he's spoilt for choice.
一只灰熊。它已經很久沒有打牙祭了，早就盼著這個機會
This Canadian bear is very special.
這只加拿大熊很特別
He's learnt to dive for his dinner.
它學會了潛水捕獵
But catching salmon in deep water is not that easy, and the cubs have lots to learn.
但要想在深水中捕獲鮭魚可不太容易，熊崽們還要很多東西要學
The annual arrival of spawning salmon brings huge quantities of food into these high rivers that normally struggle to support much life.
鮭魚每年都會到河里產卵，于是這些平常只能勉強維持眾多動物生計的高山河流終于有了提供饕餮大餐的機會
Although relatively lifeless,
盡管高山河流的生物量相對較少，
the power of these upland rivers to shape the landscape is greater than any other stage in a river's life.
它們卻有能力改變地形在河流扮演的角色中，這才是最主要的
Driven by gravity, they're the most erosive forces on the planet.
它們借助地心引力，成為地球上最大的侵蝕力量。
