比如说，地球上的水量是有限的，这些水通过自然作用得到净化。
For example, the amount of water on Earth is limited; this water is cleaned through natural processes.
在过来不同的地质时期，许多的物种由于自然作用而非人类行为而灭绝。
At various times in the geological past, many species have become extinct as a result of natural, rather than human, processes.
在过去不同的地质时期，许多的物种因为自然作用而非人类行为而灭绝。
At various times in the geological past, many species have become extinct as a result of natural, rather than human, processes.
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.
相对于后期人类作用而言，自然作用对成都盆地土壤中砷分布特征的影响占主导地位。
It is indicated that, compared with that of subsequent human activities, the influence of natural progress on the distribution of arsenic in surface soil of Chengdu basin is dominant.
结合相对论和量子理论，提出一种量子引力的理论，它的动机之一是出于美学上的对统一各种自然作用力的渴望。
Part of the motivation behind the quest to marry relativity and quantum theory - to produce a theory of quantum gravity - is an aesthetic desire to unite all the forces of nature.
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.
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.
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.
一些具有差异化的表现形式但对功能影响不大的特征- - -比如头盖骨的形状，在进化过程中可能起着比自然选择更重要的作用。
With features that can vary somewhat in form without greatly affecting function, such as the shape of the skull, chance might play a bigger role in their evolution than natural selection.
在炎热的白天，一棵树能够向大气中释出数十加仑的水分，对周围环境起到自然空调器的作用。
On a hot day, a tree can release tens of gallons of water into the air, acting as a natural air conditioner for its surroundings.
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.
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.
当雇员被信任，在各自的部分中发挥积极作用的时候，他们自然会把提高工作质量看成是自己的事。
When employees are trusted to play an active role in their organization’s leadership, they’ll naturally respond by taking a personal interest in the quality of their work.
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.
您可以尝试把闹钟设在它告诉你必须起床的时刻之前的30分钟，这与自然光亮起作用的原理是相同的。
You can try setting an alarm 30 minutes before the alarm that tells you, you have to get up, this works in the same principle as the natural light.
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.
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?
就水产养殖来讲，鱼类遗传资源会影响养殖鱼的性能，有助于养殖渔民满足消费者的需求，甚至可以影响养殖鱼类与野生鱼类在自然环境中相互作用的方式。
For aquaculture, they affect the performance of farmed fish, help fish farmers satisfy consumer demands and even influence how farmed and wild fish interact in nature.
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.
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.
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