and for short periods, they appear in astounding numbers. 在很短的时间内,它们就能达到惊人的数量.
Pumping water through their bodies they strain out algae and other edible particles. 他们用汲取海水,在身体里过滤 分离出藻类及其他可食用微粒
The turbulence stirs the water, and draws nutrients up from the depths 湍流激起海水 将深处的养分搅上来
All across the tropics, humpbacks are heading away from the Equator towards the rich temperate seas of both the southern and the northern hemispheres. 横越热带 座头鲸调头离开赤道 走向富饶而气候温和的南半球和北半球海域
These are colder, rougher, and more dangerous waters. 这些是更冷、更狂暴、更多危险的水域
She must leave now, while she still has enough energy to guide and protect her calf, on the long voyage ahead. 她现在必须离开 趁她还有足够的能量 在漫漫征途之中来指导和保护她的幼子
He's almost doubled in size and his days in his tropical nursery are coming to an end. 它的身材也大了一倍 在热带托儿所的日子也到头了