because of their ability to survive in such extreme conditions. 因为它们能在这种极端环境中生存
These are not the sort of conditions in which you would expect to find fish, 鱼类似乎不太可能生活在这种环境中
yet these cave mollies seem to thrive 然而这些洞栖帆鳍? 看上去却是悠然自得
Poisonous gases rise to fatal levels so quickly 有毒气体很快就会达到致命的程度
Bats survive by staying close to the skylights, 蝙蝠之所以能生存是因为 它们始终呆在天窗附近
It's astonishing that these extraordinary cave dwellers manage to survive at all. 这些奇异的洞栖生物能如此成功地生存 的确令人称奇
that one would not expect it to contain any life whatsoever. 不管什么生物似乎都不可能在那里生存
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