have to survive on whatever washes into the cave from outside. 必须得吃任何从外边冲进洞内的东西

265. keeping their grip with microscopic hooks on their fins.
     它们用鳍上的小钩紧紧抓住岩壁
266. Food is often in short supply
     食物总是很紧缺
267. and troglodytes like the crab
     像螃蟹这样的穴居动物
268. have to survive on whatever washes into the cave from outside.
     必须得吃任何从外边冲进洞内的东西
269. The salamander might not encounter food for several months,
     童态河溪螈可能 已有几个月没有吃东西了
270. so when something does come along
     所以只要眼前有食物出现
271. it can't afford to miss it.
     它绝对不会放过

来自《行星地球 第一季 第四集 Planet Earth S01E04 洞穴》第 268 行