Only their special space clothing would provide the air pressure they needed to stay alive.
VOA: special.2009.06.24
The vast overwhelming majority of people needed to farm land, in order to stay alive.
当时古希腊拥有众多的人口,人们需要农田才能生存
Then you really won't be able to afford to stay alive.
说不定你连活下去都很困难
So how could dinosaurs have been able to eat enough to stay alive?
VOA: special.2010.06.04
in spite of the fact that we take a variety of chemicals into our bodies in different ways and we have to do that to stay alive, but we have mechanisms to control this very well.
尽管事实是我们从不同途径,摄入各种化学物质以维持生存,但我们能够很好地控制它们在体内的总量
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