These shallows around the equator are excellent nurseries. 赤道附近的浅海是个非常理想的托儿所

9. Despite being three meters long and weighing nearly a ton, he is nonetheless vulnerable.
   虽然已经三米长,一吨重 还是比较虚弱,也容易受攻击
10. but his mother watches over him
    不过幸好有妈妈照料
11. and, as he begins to tire, she supports him close to the surface so that he can breathe more easily.
    疲劳的幼鲸被妈妈托上浮上水面好让它呼吸空气
12. These shallows around the equator are excellent nurseries.
    赤道附近的浅海是个非常理想的托儿所
13. They're warm, calm, and contain very few predators.
    温暖,平静,很少有掠食者
14. The playful calf is now drinking five hundred liters of milk a day
    顽皮的小座头鲸每天要喝500公升奶
15. but his mother must starve.
    但是它的妈妈却饿的要死

来自《行星地球 第一季 第九集 Planet Earth S01E09 海洋》第 12 行