疼痛算是一种自然防护机制的作用。
查尔斯·达尔文是第一个描述自然选择在物种形成中的作用的人，他描写了物种形成的机制。
Charles Darwin, the first to describe the role of natural selection in speciation, wrote about the mechanisms of speciation.
正如查尔斯·达尔文（Charles Darwin）所观察到的那样，只要有一种基因组成的个体比其他个体更善于繁殖，自然选择就会起作用。
As Charles Darwin observed, natural selection operates whenever individuals of one genetic composition are better at reproducing than that of others.
“这似乎是自然选择在一个群体中发挥作用的完美机会。”伊拉尔多博士说。
"It seemed like the perfect chance for natural selection to act on a population," said Dr. Ilardo.
科学家还发现，大自然似乎对女孩有另一种促进作用。
Scientists have also found that nature seems to give another boost to girls.
我们真诚地希望世界自然基金会能在保护这个濒危的野生物种中发挥作用。
We sincerely hope that WWF can play a role in protecting this endangered species.
起到稳定作用的自然植被不断减少，随后土壤受风雨的侵蚀加速，就成为了沙漠化的主要成因。
Desertification is accomplished primarily through the loss of stabilizing natural vegetation and the subsequent accelerated erosion of the soil by wind and water.
最近自然杂志上的一片文章称这可能要归咎于密西西比河的侵蚀作用。
A new paper in the journal Nature suggests the river's erosive action may be to blame.
不过，有一段时间，莫斯科市周围的土地起到了自然空调的作用，通过从地面蒸发湿气保持空气凉爽。
However, for a while the land around the city acted as a natural air conditioner, keeping the air cool through evaporation of moisture from the ground.
我们的产品呢，由胶原蛋白制成，胶原蛋白是一种自然的止血剂,有包覆的作用。
So our product, made out of collagen, collagen is a natural haemostatic that induces a reaction of cladding.
我们的产品呢，由胶原蛋白制成，胶原蛋白是一种自然的止血剂，有包覆的作用。
So our product, made out of collagen, collagen is a natural haemostatic that induces a reaction of cladding.
开发人力资源和保护自然资源对保持就业和收入增长、实现长期繁荣具有同等重要的作用。
The development of people and the protection of natural resources play an equally important role in sustaining jobs and incomes, and in increasing prosperity over the long run.
当你真正意识到一个高效的环境的作用时，你会很自然地受到它的鼓舞和激励来完成工作。
If you can realize the power of having a productive environment, you will naturally feel inspired and motivated to get work done.
如果皮肤的自然粘合性移走，磁性也应该起作用——否则就不具有磁性。
With the natural adhesive properties of skin removed, the magnetism either works-or it doesn't.
与我们所相信的截然不同，作用于每一个物种的自然选择(规律)并不喜爱长远利益。
Much as we might like to believe otherwise, natural selection, working within each species, does not favour long-term stewardship.
他认为自然选择对我们产生了作用，正如对待果蝇和蜈蚣那样。
He thought that natural selection had operated on us, just as it had on fruit flies and centipedes.
科学家通过对比不同的基因组发现，自然界的压力仍然在发挥作用。
Comparisons of different genomes show that natural pressures are still doing their thing.
但是细菌和病毒繁殖迅速，因此自然选择可以在短时间内发挥作用，使人们能够观察得到。
Butbacteria and viruses breed fast, so natural selection hastime, within the spanof a human life, to make a difference.
药物作用是生物学目标性(治疗)的，是与事物的自然秩序相违背的。
Drug activity is biologically targeted and opposes the natural order of things.
因此，很难获知究竟是某项疗程真正发生作用还是自然衰退导致的结果。
So it is difficult to know if a certain treatment actually works or was simply taken during a naturally occurring remission.
想要不受怀孕辅助药物的副作用威胁就自然怀上双胞胎吗？
Want to conceive twins naturally without the dangers of fertility drugs?
当然，在黄果树没有大自然作用下摇摇欲坠的寺庙，但是却不乏被大树的盘根错节箍定的岩石。
Of course, here at Huangguoshu there are no crumbly temples that nature has decided to reclaim, but there are plenty of rocks upon which the trees have staked out their claim.
但也有自然和传统的做法可以起作用。
But also there are natural and conventional practices that also can come into play.
这一现象促使我思考火与它作为一种自然力所起的作用。
This prompted me to consider fire and the role it plays as a force of nature.
不论关于芽孢在自然界中的作用，或有关芽孢形成的原因，都没有一致的看法。
There is no unanimity of opinion either of spore function in nature or of the factors concerned in spore formation.
但是上帝和人类的相互作用，通过历史而不是自然而产生。
But the interaction between God and humans, he says, happens not through nature but through history.
尽管它们来源于“自然界”，但它们不能摆脱潜在的副作用，如高血压，消化麻烦，生育问题和抑郁症等。
Despite their "natural" origins, they are not free of potential side effects, such as high blood pressure, digestion trouble, fertility problems and depression.
“人造叶”将利用构成光合作用中部分自然过程的反应作用，将阳光和水变成一种清洁燃料的来源。
An artificial leaf would use a reaction that forms part of the natural process of photosynthesis to turn sunlight and water into a clean fuel source.
“人造叶”将利用构成光合作用中部分自然过程的反应作用，将阳光和水变成一种清洁燃料的来源。
An artificial leaf would use a reaction that forms part of the natural process of photosynthesis to turn sunlight and water into a clean fuel source.
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