Societies need to develop highly adaptive behavioural rules for survival.
社会要生存需要建立有高度适应性的行为准则。
A struggle for survival follows.
一场生存的斗争随之而来。
In these rural areas, people depended on each other for survival.
在这些农村地区，人们为了生存互相依赖。
In extreme poverty, households cannot meet basic needs for survival.
极度贫困是指，家庭无法满足生存的基本需要。
In extreme poverty, the households cannot meet basic needs for survival.
在极端贫困中，家庭无法满足基本的生存需要。
Its chances for survival are best if it turns white about the time of the first snowfall.
如果它在第一次降雪时就变成白色，生存几率会是最高的。
Engineered for survival, insect eggs hang on and hatch wherever their parents deposit them.
昆虫为生存而精心设计的卵，就挂在父母存放它们的地方孵化。
If the earth gets hotter in the new century, what will happen to animals and the plants which animals depend on for survival?
如果地球在新世纪变得更热，那些动物以及动物赖以生存的植物将会怎么样？
The ability of a species to compete and adapt to a gradually changing environment is not the only ability that is essential for survival.
一个物种竞争和适应逐渐变化的环境的能力并不是生存所必需的唯一能力。
People count on hospitals and health facilities to respond, swiftly and efficiently, as the lifeline for survival and the backbone of support.
人们指望医院和卫生机构作为生存的命脉和提供支持的栋梁，迅速而有效地作出回应。
Play also stimulates the development of the muscle tissues themselves and may provide the opportunities to practice those movements needed for survival.
游戏也会刺激肌肉组织的生长，并能提供练习生存技能的机会。
All other issues fade into insignificance compared with the struggle for survival.
与挣扎求存相比，所有其他问题都显得不重要了。
They rely on microclimates for survival.
他们依靠微气候生存。
Even microscopic organisms rely on microclimates for survival.
甚至微生物也依靠微气候生存。
Too many species of salmon are competing for survival in one river.
太多种类的鲑鱼在同一条河流中竞争生存。
They usually operated in bands between ten and twenty strong and relied for survival on difficult terrain and bad transport.
他们通常以10到20人的队伍作战，很坚强，依靠艰难的地形和糟糕的交通条件生存下来。
Plant species dependent solely on seeds for survival or dispersal are obviously more vulnerable to any decrease in plant fecundity that occurs.
显然，仅依靠种子生存或传播的植物物种更容易受到植物繁殖力下降的影响。
Fiat was in a fight for survival.
那时菲亚特正为生存而战。
No need to flirt for survival.
你不需要通过调情才能生存。
Fear is a natural mechanism for survival.
恐惧是一种自然的生存机制。
Israel fought a desperate battle for survival.
以色列为生存而进行殊死战斗。
As such, compromise is a useful tool for survival.
像这样，妥协是有用的生存工具。
Over millions of years your body has evolved for survival.
上百万年来，你的身体为了生存一直在进化着。
In real competition, efficiency is necessary for survival.
在真正的自由竞争下，效率对生存来说是必须的。
In real competition, efficiency is necessary for survival.
在真正的自由竞争下，效率对生存来说是必须的。
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