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Even in the best-case scenario,
即使在最好的情況下
the environment on early Mars
早期火星的環(huán)境
would still have been pretty hostile.
依然非常惡劣
So to understand if extraterrestrial life could have formed,
想了解地外生命是否曾經(jīng)出現(xiàn)
astrobiologists like Lewis Dartnell need to find out
劉易斯·達特內(nèi)爾等天體生物學(xué)家要找出
the most extreme conditions
生命可以存活的
in which life could still survive.
最極端條件
They do it by looking for the limits of life here on Earth.
他們要在地球上 探索生命的極限
Searching out harsh, dangerous environments,
搜索危險 惡劣的環(huán)境
places where we used to think life could never exist.
我們曾經(jīng)認為 那里不會有生命存在
A lot of what we're trying to do
我們的主要目標
is understand the limits of terrestrial organisms.
是弄清地球生物的極限
What's the survival envelope of Earth life,
地球生命的生存極限在哪里
so places that are very hot and acidic
是炎熱且酸性的土地
or are very cold and dry, like Antarctica,
還是嚴寒干旱的土地 比如南極洲
or some very high-pressure, very high temperature places,
又或者是高溫高壓的地方
like the black smokers
像是海底"黑煙囪"
and the hydrothermal vents on the sea floor.
和海床上的深海熱泉
重點解釋：
1.find out 發(fā)現(xiàn)
例句：Find out what the conditions of the contract are.弄清楚合同的條件是什么。
2.look for 尋找
例句：He turned on the torch to look for his keys.他打開了手電筒，尋找鑰匙。
3.vent on 遷怒
例句：He longed to vent on George all the spite he felt against his former associates.他很想把自己對過去同事的怨恨發(fā)泄在喬治身上。
