- but venturing deep into the cave is very dangerous indeed.
但是深入洞穴必然极度危险 - 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 - It mixes with oxygen and the water,
与水中的氧发生化合反应 - and forms sulphuric acid.
产生了硫酸 - 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
It mixes with oxygen and the water, 与水中的氧发生化合反应
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