Like many tropical shallow seas 和多数热带浅海域一样

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
19. They receive year round sunlight but they lack the nutrients essential for the growth of plankton.
    虽然充满阳光 但是这里主要缺少浮游生物生长所需的养分
20. The mother will be trapped here for the next five months
    母座头鲸接下来要困在这里大约5个月

来自《行星地球 第一季 第九集 Planet Earth S01E09 海洋》第 17 行