查询词典 natural selection

As part of the disagreement about whether natural selection alone was sufficient to explain speciation, George Romanes coined the term neo-Darwinism to refer to the version of evolution advocated by Alfred Russel Wallace and August Weismann with its heavy dependence on natural selection.

是否单独自然选择就足以解释物种形成是争论的一部分；乔治·罗曼纳创造"新达尔文主义"一词，以代表阿尔弗雷德·罗素·华莱士和奥古斯特·魏斯曼所倡导的、强烈依赖自然选择的进化版本。

RC-2 and RC-3 were pairs by natural selection, the tone quality of them was one pure, other noisy, RC-1 had same tone quality for being a pair by artificial combination, so the tone quality of both sexes could be related with their sexual selection.

由于2号与3号鹤是自然选择配对的，它们的配偶间音质是—纯—杂，而1号鹤雌雄音质相同，它们的配对关系是人为组合而成，因此雌雄鸣声音质纯度配合可能与它们的性选择有一定的相关。

Natural selection in biology could work the same way, Dewar thinks:"In physics, to speak of natural selection is to ask, among all possible states, which is the one that nature selects."

生物中的自然选择也是按照同样的方法运行的，Dewar认为："在物理学中，我们说自然选择其实就是在问，在所有的可能状态中，哪一个是被自然所选的。"

He stumbled upon a volume, The Genetical Theory of Natural Selection, written by R.

费希尔（6在1929年写的《自然选择的遗传理论The Genetical Theory of Natural Selection》，顿时受到启发。

Natural selection was expected to work very slowly in forming new species, but given the effectiveness of artificial selection, he could "see no limit to the amount of change, to the beauty and infinite complexity of the coadaptations between all organic beings, one with another and with their physical conditions of life, which may be effected in the long course of time by nature's power of selection".

预计在形成新物种上，自然选择起效非常缓慢；但考虑到人工选择的有效性，他可以"设想到变化的数量是无限的，美丽是没有限度的；所有有机生命之间的互相适应的复杂性是无限的，彼此之间的相互适应以及它们生活状况之间的相互适应是无限复杂的，这些都可能在很长的时间里受到自然力量选择的影响"。

Artificial selection is a special kind of natural selection.

人工选择是一种特殊的自然选择。

The implication is that such irreducibly complex structures or machines cannot be built by natural selection because in natural selection, each component must be useful to the organism as the molecular machine is built.

像这样不能简化地复杂的结构或机器，不可能透过物竞天择来建立，因为在物竞天择中，建立分子机器时，每个元件对生物的功用必须同时存在。

As part of the disagreement about whether natural selection alone was sufficient to explain speciation, George Romanes coined the term neo-Darwinism to refer to the version of evolution advocated by Alfred Russel Wallace and August Weismann with its heavy dependence on natural selection.

是否单独自然选择就足以解释物种形成是争论的一部分；乔治·罗曼纳创造&新达尔文主义&一词，以代表阿尔弗雷德·罗素·华莱士和奥古斯特·魏斯曼所倡导的、强烈依赖自然选择的进化版本。

Darwin had initially decided to call his book An abstract of an Essay/on the/Origin/of/Species and Varieties/Through natural selection/, but with Murray's persuasion it was eventually changed to the snappier title: On the Origin of Species, with the title page adding by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life.

最初，达尔文打算称他的著作为《随笔摘要/论物种和品种的起源/通过自然选择》，但穆雷说服他最终改为简明有力的名称《物种起源》，书名页加上《通过自然选择，或生存斗争中有利种类的保留》。

Natural selection in biology could work the same way, Dewar thinks:"In physics, to speak of natural selection is to ask, among all possible states, which is the one that nature selects."

生物中的自然选择也是按照同样的方法运行的，Dewar认为：&在物理学中，我们说自然选择其实就是在问，在所有的可能状态中，哪一个是被自然所选的。&

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。