By night, they seek small fish among the plankton, 晚上,鱿鱼寻找浮游生物和小鱼

211. Got something.
     得到什么东西了
212. And just as well. Dawn is approaching and it has to puff it's way back, to deeper waters.
     如愿以偿. 黎明快到了所以它必须回到深海里去
213. Thirty miles away, shoals of squid are jetting upwards towards the surface.
     30英里外的海上, 大量的鱿鱼游到海面上
214. By night, they seek small fish among the plankton,
     晚上,鱿鱼寻找浮游生物和小鱼
215. but they're cautious.
     不过它们必须谨慎
216. Pacific spotted dolphin.
     太平洋花斑原海豚
217. They're guided by their sonar.
     它们靠声纳导航

来自《行星地球 第一季 第十一集 Planet Earth S01E11 海洋深处》第 214 行