Farmers struggling for survival strip the forests for agricultural land.
为生存而挣扎的农民们把森林伐光来作农业用地。
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。
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。
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。
Experts say Paris is right: for a sudden heart failure, the single best chance for survival is having someone nearby step in and do CPR quickly.
专家称帕里斯的做法是正确的：对于突发性心力衰竭，最好的办法是周围的人迅速对其进行心肺复苏。
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。
"I have an instinct for survival, for self-preservation," he reflects.
“我要生存，我要自我保护，这就是我的本能，”他会这样想。
The motivation for survival is inherent within every biological species.
生存是所有生物物种固有的内在动机，人类也不例外。
They maintain a hierarchy for survival, not for prestige or arrogance.
它们维持等级制度，是为延续生存而非威望和自满。
Such behavioral contagion probably evolved early for survival, some scientists argue.
许多科学家人文这种行为最初的形成是出于生存的需要。
Polar bears depend on solid sea ice for survival; it's where they do their hunting.
北极熊在厚厚的海洋冰层上猎食，以此为生。
Hundreds of Tuareg fighters stood by him as his regime fought a losing battle for survival.
在上校最终败北的生存之战中，几百名柏柏尔族战士站在了他的一方。
What do you have beyond those things needed for survival, comfort, happiness, and thriving?
除了这些满足生存，舒适，幸福及事业有成所需的物品你还有些什么？
There is a battle for survival and eventually it is just Pi and the tiger left in the small boat.
故事讲的是一场生存的战斗，最后只有派和老虎留在了那只小船上。
Westerners tend to forget that for much of the world being polyglot has been a necessity for survival.
西方人逐渐遗忘了一点：对于世界上很多人来说通晓数国语言其实是为了生存的需要。
The trick, Dr Smith suggests, is to cut patients' iron intake to the minimum necessary for survival.
史密斯博士的技巧是，将病人的铁摄入量减少到维持生命的最低水平。
Thus, a preference for food with a higher fat and alcohol content would have been important for survival.
因此，偏爱高脂肪食物和高酒精含量的饮料本应对生存也是至关重要的。
Thus, a preference for food with a higher fat and alcohol content would have been important for survival.
因此，偏爱高脂肪食物和高酒精含量的饮料本应对生存也是至关重要的。
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