The source of these toxic fumes lies several miles below. 这些毒气的源头位于地下几英里处
Hydrogen sulphide gas bubbles up from oil deposits in the earth's crust. 硫化氢气体从地壳内的油气储层中溢出
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
The water flowing out of the Villa Luz cave in Mexico 从墨西哥露兹别墅山洞流出来的水
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
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
The cave angel fish feed on bacteria in the fast flowing water 洞穴天使鱼以急流中的细菌为食
But the blind salamander has other highly developed sensory organs. 不过这些瞎眼的蝾螈 进化出了其它发达的感觉器官
Receptors in their skin detect minute movements in the water made by its prey. 皮肤上的探测器能觉察到 猎物引起的最微小的水流变化