but his mother must starve. 但是它的妈妈却饿的要死

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
16. There is nothing for her to eat here.
    在这里母鲸没有东西可以吃
17. Like many tropical shallow seas
    和多数热带浅海域一样
18. these crystal clear waters are virtually lifeless.
    这片明净的水域实际上没有什么生机

来自《行星地球 第一季 第九集 Planet Earth S01E09 海洋》第 15 行