Why does the fossil record not document the series of evolutionary changes during the evolution of animals?
为什么化石记录没有记录动物进化过程中的一系列进化变化？
They reasoned that while some evolutionary changes involve the loss of genes and are therefore irreversible, others may be the result of genes being switched off.
他们推断，虽然一些进化上的变化涉及基因的丢失，因此是不可逆转的，但其他的变化可能是基因被关闭的结果。
But not all evolutionary changes make inherent sense.
但不是所有的进化都有内在的意义。
This phenomenon is sometimes used to explain rapid evolutionary changes.
这种现象有时被用来解释快速演化。
Evolutionary changes show a clear heritage to prior service specifications.
渐进的更改表现出对以前服务规范的明显继承。
They wondered about whether there had been evolutionary changes in the Encephalization Index.
他们想知道在脑力指数中是否在进化中会发生改变。
Fossils can also be compared with their extant relatives to assess evolutionary changes.
化石也能与它们现存的亲属作比较，以评价其演化变化。
Therefore your Club must continually monitor these evolutionary changes in order to adapt and thrive.
这样一来，你的俱乐部必须不断变化才能跟上时代。
The researchers at Stanford, Georgia and Pennsylvania State universities in the US wanted to trace evolutionary changes in human DNA.
项目研究人员分别来自美国斯坦福、乔治亚和宾夕法尼亚州立大学，他们试图找出人类进化过程中基因的演变。
It is up to each human to "intend to ascend" upon a daily basis to bring forth the next phase of evolutionary changes to keep pace with Earth.
这是由每个人自己决定是否在每日基础上“愿意提升”的，从而带来下一阶段的进化改变以跟上地球的步伐。
Indeed, the rise of farming has been linked to evolutionary changes in genes for other enzymes, such as amylase, which breaks down starch, and lactase, which breaks down lactose in milk.
确实，农业的兴起与基因上很多酶的进化变化紧密联系，如那分解淀粉的淀粉酶amylase，和乳糖分解酶，分解牛奶中的乳糖等。
These parasites are often found stranded on lineages of hosts over long periods of time, permitting researchers to learn about evolutionary changes in the host based on changes in the parasite.
很长的时间以内这些寄生物都能经常在寄主的衣服上被发现，使得研究人员能够基于寄生物的演变来研究寄主的进化演进。
The alternative view, that evolutionary changes tick along gradually, suggests mutations would accumulate incrementally as time goes by, independently of how many new species a lineage spins off.
与此相对应，认为进化上的改变是渐进式的观点认为突变是随着时间的流逝而不断积累的，这一过程同一支世系衍生出新物种的多少无关。
Scientists believe earthworms have undergone rapid evolutionary changes at abandoned mines in Britain, which have enabled them to survive and even thrive in an environment rich in toxic heavy metals.
科学家们相信，英国废弃矿井中的这些蚯蚓经历了快速的进化，废弃矿井使它们能够在富含重金属的环境中生存，甚至茁壮成长。
Since an individual's social environment affects its success in terms of survival and reproduction, you might expect such changes to influence the speed or direction of evolutionary change.
既然，个体的社会环境会影响到它的生存和繁殖能力，那么进化的速度或方向会受到这些变化的影响也许就在会预料之中了。
Evolutionary pressure changes the way that organisms evolve.
进化的压力改变微生物演变的方式。
This part of the evolutionary tree is very sensitive to small changes in how we interpret the anatomy and the combination of anatomical features we see in these animals as they are discovered.
进化树上的这一部分对我们如何解释结构特征的分解和组合变得非常敏感，对当它们被发现时我们看待它们结构特征的小小改变变得非常敏感。
Whereas some of these changes are evolutionary and are intended mainly to increase the productivity of existing plants, completely new technologies for burning coal cleanly are also being developed.
虽然某些技术改进是渐进的，其目的只是提高现有电厂的生产率，但人们正在开发全新的清洁燃煤的技术。
Trevor Price, an evolutionary ecologist at the University of Chicago in Illinois, says that the authors make a compelling case for speciation driven by sensory changes.
TrevorPrice是伊利诺斯州芝加哥大学的一名进化生态学家，他说，由于感官变化驱使的物种形成，作者提出充分的理由，令人佩服。
It's taking an evolutionary path that integrates the seismic changes in the digital world into its flagship products, without any jarring leaps.
它采取了一个渐进的途径，将数字世界的巨变整合进自己的旗舰产品而不至于让人产生不舒服的感觉。
The second reason is because the changes in the framework itself are more evolutionary.
第二个原因在于框架本身的改变也具有演化性。
The reason for believing that prolonged life is an evolutionary response to starvation rather than just a weird accident is that when an animal is starving the evolutionary calculus changes.
有人认为生命延长是对饥饿演化的一个反应，而仅仅是一个怪异的事件，其原因在于当动物饥饿的时候，其演化结构也会改变。
More recent work has begun looking beyond the body's basic building blocks to reveal how changes in development have resulted in some of the world's most celebrated of evolutionary events.
最近已经开始进行的研究工作致力于研究身体的基本构件之外的东西，以便揭示发育的改变如何造成了世界上最著名的一些进化事件的发生。
While many technological advances occur in an evolutionary manner, occasionally a revolutionary technological appears on the horizon that creates startling new conditions and profound changes.
技术的进步大多以渐进的方式进行，但有时可能出现突破性进展，带来令人吃惊的新情况和深远的变革。
The changes it will fashion could be evolutionary or they could blow the whole system apart and replace it with something radically different.
由此带来的变化可能是逐进的，或者也可能彻底摧毁整个系统，然后用一些截然不同的东西取而代之。
"Changes are a normal part of the evolutionary process," says oncologist William Haywar.
变化是进化过程中的正常部分，“肿瘤专家威廉·海沃德说道。”
"Changes are a normal part of the evolutionary process," says oncologist William Haywar.
变化是进化过程中的正常部分，“肿瘤专家威廉·海沃德说道。”
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