生活变成了一场争取生存的斗争。
社会要生存需要建立有高度适应性的行为准则。
Societies need to develop highly adaptive behavioural rules for survival.
为生存而挣扎的农民们把森林伐光来作农业用地。
Farmers struggling for survival strip the forests for agricultural land.
他主要在纽约市工作，那里的生存空间出了名地昂贵。
He worked mainly in New York City where living space is notoriously at a premium.
那次手术是凯利生存的唯一希望。
这完全是能不能生存的问题。
你的“生存”是什么意思？
人只有靠自己的思想才能生存。
一场生存的斗争随之而来。
如果锌如此缺乏，硅藻是如何生存的呢？
现在，迁徙是一种自然的生存策略。
没有鱼能在这个天然有毒的湖中生存。
请教他生存的技巧和策略。
不能察觉危险的动物无法生存。
你教过他生存的技巧和策略吗？
这是灌木能在北极生存的原因之一。
That's one of the reasons that shrubs survive in the Arctic.
极度贫困是指，家庭无法满足生存的基本需要。
In extreme poverty, households cannot meet basic needs for survival.
低盐度和高温有利于海星幼虫的生存。
Low salinity and high temperatures favor the survival of the starfish larvae.
攻击性是一种天生的生存机制，一种自我保护的本能，使动物能够保护自己不受生存威胁。
Aggression is a kind of innate survival mechanism, an instinct for self preservation, that allows animals to defend themselves from threats to their existence.
躲藏是最佳的生存方式之一。
几个世纪以来，那儿的农民勉强能维持生存。
For centuries farmers there have only just managed to survive.
公众对事故的担心正威胁着核电工业的生存。
Public worries about accidents are threatening the very existence of the nuclear power industry.
经济衰退削弱了很多企业的实力，以至于很多无法再生存下去。
The recession has weakened so many businesses that many can no longer survive.
物竞天择确保只有最适应环境的物种才得以生存下来，把基因传递给下一代。
Natural selection ensures only the fittest survive to pass their genes on to the next generation.
一方面，如果身体没有足够的胆固醇，我们将无法生存；另一方面，如果体内胆固醇过多，多余的胆固醇就开始让动脉变厚。
On the one hand, if the body doesn't have enough cholesterol, we would not be able to survive. On the other hand, if the body has too much cholesterol, the excess begins to line the arteries.
森林污染严重影响了植物的生存，其次也对野生动物造成了影响。
The pollution of the forest has seriously affected plant life and, to a lesser extent , wildlife.
我们的生存与雨林的生存息息相关。
Our survival is inextricably linked to the survival of the rainforest.
服装业竞争极为激烈，要想生存就要有足够的关系。
The rag trade is extremely competitive, and one needs plenty of contacts in order to survive.
若要使这些美丽的动物能生存下去，现在就要行动起来。
The time has come for action if these beautiful animals are to survive.
他讲述了沦为阶下囚的4个月中生存的种种不易。
He described the difficulties of surviving for four months as a captive.
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