Contagious yawning is thought to be an evolved mechanism for keeping groups alert so they "remain vigilant against danger," Gallup said.
呵欠传染被认为是进化出来用于保持群体的警惕性使群体“在危险面前保持警觉，”盖洛普说。
Like animals, humans evolved with an elaborate mechanism for processing information about potential threats.
和动物一样，人类进化出了一套复杂的机制，来处理有关潜在威胁的信息。
Because the oil is used as a reserve nutrient—like fat—diatoms have evolved no mechanism to secrete it.
由于油的作用是营养储备——就象脂肪似的——所以硅藻没有进化出分泌油份的机制。
Our preference for sweets and fats is an evolved psychological mechanism. We do not consciously choose to like sweets and fats; they just taste good to us.
人们偏爱糖果和油脂就是一种精密的心理演化机制，我们不是有意识的去选择喜欢甜食和脂肪，只是它们的味道实在不错而已。
This mechanism probably evolved to make sure starving mammals don\\\\\\\'t go to sleep when they should be foraging for food.
这种机制可能是为了确保饥饿的哺乳动物不要在该去觅食的时候沉沉睡去。
IN THE dry desert on the west coast of Namibia, where the annual average rainfall is a meagre 40mm, the Namib beetle (Stenocara gracilipes) has evolved a unique mechanism to drink.
在年平均降水量仅有40毫米的纳米比亚西海岸的干燥沙漠里，纳米布甲虫已进化出独特的集水机能。
"CO2 detection could have evolved as a mechanism to recognize CO2-producing sources - for instance, to avoid fermenting foods," they wrote.
“二氧化碳探察可能演变为一种识别二氧化碳生产源的机能——例如，避免发酵食品。”他们写道。
Cortisol and adrenaline are essential components of humans' 'fight or flight' mechanism - the neuro-biological response to stressful situations that has evolved through millions of years.
皮质醇和肾上腺素是人体对抗机制的必要组成部分，这种生物神经机能对于危险情势的反应已经进化了数百万年。
This primitive mechanism evolved to keep us on task when something especially stimulating (“valuable”) is around.
当一些东西尤其是刺激（“价值”）存在于周围时，大脑的原始机制促使我们坚持做下去。
Presumably what is happening is that a mechanism which evolved to assess biology cannot easily cope with artefacts.
也许这种原本评估生物体的机制不能轻松准确地评估人造物品。
To ensure genome integrity and prevent aneuploidy, eukaryotes have evolved an integrated protective mechanism, including cell cycle control, checkpoint control, and DNA repair.
真核生物对维持基因组的稳定性及防止非整倍体的产生，有其一套完整的保护机制，即细胞周期调控、检验点调控以及对损伤DNA的修复。
The scientists conclude that our aversion to bad behavior and to bad food may have evolved from a primitive defense mechanism that nowadays protects us from both insult and injury.
科学家们得出的结论是：我们对不良行为和糟糕食物的讨厌可能从一种原始的防御机制进化而来，进化到今天，这种防御机制既能保护我们免于受到侮辱，也能防止我们受到伤害。
The scientists conclude that our aversion to bad behavior and to bad food may have evolved from a primitive defense mechanism that nowadays protects us from both insult and injury.
科学家们得出的结论是：我们对不良行为和糟糕食物的讨厌可能从一种原始的防御机制进化而来，进化到今天，这种防御机制既能保护我们免于受到侮辱，也能防止我们受到伤害。
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