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It's astonishing that these extraordinary cave dwellers manage to survive at all.
這些奇異的洞棲生物能如此成功地生存，的確令人稱奇
But one cave is so inhospitable that one would not expect it to contain any life whatsoever.
可是有一個洞穴的環境過于險惡，不管什么生物似乎都不可能在那里生存。
The water flowing out of the Villa Luz cave in Mexico is actually coloured white with sulphuric acid.
從墨西哥露茲別墅山洞流出來的水，竟然被硫酸染成了白色
Explorers entering this dangerous cave must wear respirators and carry monitors.
探險家們進入這個危險的山洞時，必須戴上防毒面具，并攜帶通話器。
Poisonous gases rise to fatal levels so quickly that an early warning system is essential.
有毒氣體很快就會達到致命的程度，所以即時預警設備是最重要的。
Bats survive by staying close to the skylights, but venturing deep into the cave is very dangerous indeed.
蝙蝠之所以能生存是因為它們始終呆在天窗附近，但是深入洞穴必然極度危險。
The source of these toxic fumes lies several miles below.
這些毒氣的源頭位于地下幾英里處
Hydrogen sulphide gas bubbles up from oil deposits in the Earth's crust.
硫化氫氣體從地殼內的油氣儲層中溢出
It mixes with oxygen in the water and forms sulphuric acid.
與水中的氧發生化合反應，產生了硫酸。
These are not the sort of conditions in which you would expect to find fish.
魚類似乎不太可能生活在這種環境中
Yet these cave mollies seem to thrive, despite the acid and the low levels of oxygen.
然而這些洞棲帆鰭鳉看上去卻是悠然自得，盡管這里是酸性低含氧量環境。
There is, in fact, more life here than anyone would think possible,
事實上，這里的生物數量遠比人們預料的更多，
but the biggest surprise is something altogether more bizarre.
不過更大的驚奇莫過于那些更奇怪的東西。
