Birds are widely believed to have evolved from dinosaurs.
鸟类普遍被认为是从恐龙进化而来的。
The bright plumage of many male birds was thought to have evolved to attract females.
许多雄鸟的鲜艳羽毛被认为是为吸引雌鸟而进化来的。
That may be a hint that yawn evolved as a social cue—"time for us all to go to bed".
也许这是打哈欠进化为社交线索的一种暗示——“到我们大家睡觉的时间了”。
Primates and birds' brains have evolved along different tracks, but ended up with similar abilities.
灵长类动物和鸟类的大脑沿着不同的轨迹进化，但最终拥有相似的能力。
As feathers became larger over time, flapping flight evolved and birds finally became fully air-borne.
随着时间的推移，羽毛变得越来越大，扑翼飞行逐渐发展，鸟类最终完全可以在空中飞行。
If the toco toucan had evolved in chilly Ireland, its impressive bill would have been much more modest.
如果托哥巨嘴鸟是在寒冷的爱尔兰进化而来的，它那令人印象深刻的喙部就会比现在小得多了。
Traditional marriage has evolved from a near-universal ritual to a luxury for the educated and affluent.
传统婚姻已经从一种近乎普遍的仪式演变为受过良好教育和富裕阶层的奢侈品。
It is possible that our visual system, which evolved in the great outdoors, finds it easier to process such patterns.
我们在大自然中进化而来的的视觉系统，也许能够更轻易地处理这些图案。
There are two main groups of bats, which are believed to have evolved independently of each other, but both from a common ancestor.
蝙蝠主要有两大类，人们认为它们是各自独立进化的，但都来自同一个祖先。
Although many lines of evidence indicate that birds evolved from ground-dwelling theropod dinosaurs, some scientists remain unconvinced.
尽管有许多证据表明鸟类是从陆生兽脚亚目恐龙进化而来的，但一些科学家仍然表示怀疑。
Firstly, it provides vital information about the way that people evolved—information not always easily obtainable from excavated artefacts alone.
首先，它提供了关于人类进化方式的重要信息——仅从出土文物中很难获得这些信息。
In short, our brain evolved circuits to allow us to experience sympathy, which in turn made civilization, and ethics based on sympathy, possible.
简而言之，我们的大脑进化出了让我们体验同情的回路，这反过来又使文明和基于同情的伦理成为可能。
They have evolved special "heaters" of modified muscle tissue that warm the eyes and brain, maintaining peak performance of these critical organs.
它们进化出了一种特殊的“加热器”，由经过改造的肌肉组织构成，可以温暖眼睛和大脑，使这些关键器官保持最佳状态。
By comparing the DNA of carnivorous plants with other species, scientists have found that they evolved independently on at least six separate occasions.
通过比较食肉植物和其他物种的DNA，科学家发现它们至少在6个不同的时期独立进化。
"Flamingos have evolved very leathery skin on their legs so they can tolerate the salt water," says David Harper, a professor at the University of Leicester.
莱斯特大学教授戴维·哈珀表示：“火烈鸟的腿上已经进化出了非常坚韧的皮肤，这样它们就可以忍受盐水。”
Chlorophyll, although exquisitely evolved to capture the energy of sunlight, can sometimes be overwhelmed by it, especially in situations of drought, low temperatures, or nutrient deficiency.
叶绿素虽然已经进化得极为精巧，能捕捉阳光中的能量，但有时也会应接不暇，特别是在干旱、低温或缺乏营养的情况下。
Probably back in some previous biology course you learned that snakes evolved from lizards, and that the first snakes weren't venomous and then along came more advanced snakes, the venomous snakes.
也许在以前的生物课上，你学过蛇是由蜥蜴进化而来的，而且最初的蛇是没有毒的，后来出现了更高级的蛇，也就是毒蛇。
Salsa is a kind of dancing that evolved in the mid-1970s in New York.
萨尔萨舞是20世纪70年代中期在纽约发展起来的一种舞蹈。
The idea evolved from a drawing I discovered in the attic.
这种想法是从我在阁楼里发现的一幅画得到启发的。
Modern dance evolved in the late nineteenth, early twentieth century, and in most cases, audiences were very receptive to this radical new type of performing art.
现代舞是在19世纪末20世纪初发展起来的，在大多数情况下，观众对这种全新的表演艺术接受度很高。
As socialism with Chinese characteristics has entered a new era, the main contradiction facing Chinese society has evolved.
随着中国特色社会主义进入新时代，中国社会面临的主要矛盾发生进一步的变化。
Such community engagement is characteristic of the Chicano art movement as a whole, which evolved from the same foundations as the Chicano civil rights movement of the mid-1960s.
这种社区参与是整个奇卡诺艺术运动的特征，它与60年代中期的奇卡诺民权运动有着相同的发展基础。
The whole idea evolved from a casual remark.
整个想法是由一句脱口而出的话演变而来的。
GUI interfaces have evolved to resemble everyday objects.
图形化用户界面已经进化到和日常用品一样了。
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。
Later, some of those flightless insects evolved wings again.
可是再后来，其中一些失去飞行能力的竹节虫又重新长出了翅膀。
We've evolved over millions of years to sense the world around us.
在上百万年的进化中，我们一直在感知周围的世界。
Our sensitivity to bitterness may have evolved to protect us from poisons.
对苦味如此敏感的好处是避免我们中毒。
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