他们一年中大部分时间在雪下生存，只在夏季数月中被融雪灌溉而生长。
They survive being covered in snow most of the year, only growing briefly during the summer months, watered by snowmelt.
生物学家们在一棵松树上发现了一只怀孕的蝙蝠妈妈，并说他们也许能够帮助改善蝙蝠的生存环境。
Biologists found a pregnant female roosting in a pine tree, and say they might be able to improve the bats' living situation.
他们彼此孤立，只盯着个人的生存状况，保护自家的农作物。
they were very isolated and totally focused on their own individual survival.
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