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.
目的探讨糖脂代谢在胆囊结石形成中的作用。
Objective to study the effects of glucose and lipid metabolism on gallstone formation.
目的研究血管活性肽在血管再狭窄形成中的作用。
Objective To investigate the effects of several vasoactive peptides on the development of restenosis.
本文论述了几种主要的煤化因素在煤化产物形成中的作用。
The effect of several main factors forming coalification products is expounded in this paper.
这些结果在理解记忆和成瘾形成中的分子作用过程上迈进一大步。
These results are a major step forwards in understanding the molecular processes underlying memory and addiction.
它证明了一种分子在记忆形成中，特别是在长期记忆形成中的主要作用。
It demonstrates that one of the molecules has a major effect on memory formation and in particular in long-term memory.
在某些悲观人士看来，对于一个正在形成中的世界强国而言，这一局面将不可避免。
Some pessimists see that as inevitable for a world power in the making.
至于他研制能够真正预防慢性创伤的希望，困难还很大——特别是涉及创伤形成中的诸多复杂因素。
And, as for his hopes to develop bedsheets that can actually prevent chronic wounds, the hurdles are great too-especially given the many complex factors involved in the wounds' formation.
这些分子结合在一起，在蛋白质中形成所谓的希夫碱。
The molecules combine, forming what is called a Schiff base within the protein.
在形成的过程中，材料必须接收到环境信号，反映气候变化，并能被现代物理或化学手段破译。
In the process of formation, the material must have received an environmental signal that reflects a change in climate and that can be deciphered by modern physical or chemical means.
这些问题在和平进程中形成一条明显的裂纹。
These issues have created a stark fault line within the Peace Process.
他的出现应该能填补过去几天中形成的权力空缺。
His presence should fill the power vacuum that has been developing over the past few days.
当我到达时，穹顶和尖塔形成的泛着微光的空中轮廓线铭刻在我的记忆中。
As I arrived, the shimmering skyline of domes and minarets was imprinted on my memory.
随着海拔的升高，沼泽中形成了又窄又深的水渠。
As elevation increases, narrow, deep channels of water form throughout the marsh.
没有什么简单或单一的因素能决定一个给定的地点是否会成为热带草原，但部分因素似乎在热带草原的形成中扮演着重要的角色。
There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
溶液中的盐份富集在聚合物分子的带电基团附近，并形成盐浓度梯度分布。
Salts are enriched around electriferous groups of polymer molecules in solution, which formed a salt concentration gradient.
上次我们开始讨论了冰川以及这些大型冰块是如何从结晶雪中形成的，你们中的一些人对这些冰川的巨大感到惊讶。
Last time, we started to talk about glaciers and how these masses of ice form from crystallized snow, and some of you were amazed at how huge some of these glaciers are.
这次爆炸将大约100万亿吨的尘埃提升到大气中，这一数字可以通过测量这些尘埃降落到地表时所形成的沉积层的厚度来确定。
The explosion lifted about 100 trillion tons of dust into the atmosphere, as can be determined by measuring the thickness of the sediment layer formed when this dust settled to the surface.
在这些地区，每个月的降雨量超过了上述定义中的量，所以一定有其他因素促成草原的形成。
In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
云是由海洋中的水分被太阳加热蒸发而形成的，这些水分上升到大气中，凝结成微小的水滴，附着于微小的尘埃颗粒。
Clouds are formed from the evaporation of the oceans' water that is warmed by the Sun and rises high into the atmosphere, condensing in tiny droplets on minute particles of dust.
每块阿伦德碎片样本都覆盖着一层黑色的、玻璃样的熔壳，这层熔壳是在它们的外表面与地球大气层摩擦减速中熔化形成的。
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere.
如果潜水员从一个高压的水下环境迅速上浮到一个低压的水下环境，他们的血液和组织中溶解的气体就会膨胀并形成气泡。
If a diver ascends too quickly from a high-pressure underwater environment to a lower-pressure one, gases dissolved in blood and tissue expand and form bubbles.
在锥实螺的例子中，研究表明右旋基因是在卵的形成期表达的。
In the case of Lymnaea peregra, studies indicate that a dextral gene is expressed during egg formation.
当接缝和裂缝扩大形成空洞时，大量的水也会被储存在石灰岩中。
Large quantities of water may also be stored in limestones when joints and cracks have been enlarged to form cavities.
在感染后期，数以百万计的新病毒颗粒形成并包裹在多面体晶体中。
Late in the course of the infection, millions of new virus particles are formed and enclosed in polyhedron crystals.
持续的轰击和内部压力使成长中的地球越来越热，导致其内部融化，较重的元素下沉形成地核。
Continued bombardments and internal pressures made the growing Earth hotter, causing its interior to melt and the heavier elements to sink and form Earth's core.
因此，木卫二的地下海洋中光线的缺乏，并不意味着不可能有生命形成。
So the lack of light in Europa's subsurface ocean doesn't automatically rule out life forming.
因此，所有这些都有助于在社区中形成一种从众的态度，你也可以明白为什么这种谦逊的、非常朴素的风格会在新英格兰农村地区被如此广泛地模仿。
So all these help to create an attitude of conformity in the community, and you can see why a modest, a very plain style would have become so widely imitated throughout rural New England.
然而，在年龄较大的孩子中，他们能记住的早期事情在形成过程中会变得更成人化。
In older children, however, the early things they can remember become more adult like in the way they are formed.
然而，在年龄较大的孩子中，他们能记住的早期事情在形成过程中会变得更成人化。
In older children, however, the early things they can remember become more adult like in the way they are formed.
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