自然选择

The consequence is what Darwin described in his book as a "struggle for existence".

通过结合这些观点，达尔文在他的书中把自然选择的过程的描述为&适者生存&。

In fact, geneticists have known for a long time that natural selection does not always have an opportunity to work perfectly.

事实上，遗传学家们很久以前就已经知道，自然选择并非总是有机会很理想地发生作用的。

Discoveries of early geneticists were difficult to reconcile with gradual evolution and the mechanism of natural selection.

早期遗传学家的发现难以用逐步进化和自然选择机制解释。

Paediatricians suspect some are killed in infancy—not Darwin's natural selection but the dispensing of an extra mouth to feed.

儿科医生猜测也许有些孩子早在婴儿时就被杀死了——这并非达尔文的自然选择理论，而是为了减少一张吃饭的嘴。

Changes in allelefrequencies brought about by mutation ,genetic drift ,gene flow,and natural selection.

又称种内进化，是由突变，遗传漂变，基因流和自然选择导致的等位基因频率的改变。

Changes in allelefrequencies brought about by mutation ,genetic drift ,gene flow,and natural selection.

又称种内进化，是由突变，遗传漂流，基因漂变和自然选择导致的等位基因频率的改变。

Never fully convinced that natural selection was sufficient to explain development, Huxley did accept that The Origin of Species (1859), a lantern in the dark world, made the case for evolution sufficiently strong even for an agnostic.

从不完全相信自然选择足以解释进化，赫胥黎接受这个事实，《物种起源》犹如黑暗世界里的一盏明灯，使进化足够强有力即使是对不可知论者来说。

10Never fully convinced that natural selection was sufficient to explain development, Huxley did accept that The Origin of Species (1859), a lantern in the dark world, made the case for evolution sufficiently strong even for an agnostic.

赫胥黎从不完全相信自然选择足够解释发展，但是他接受《物种起源》是黑暗世界的一盏明灯甚至对一个不可知论者来说，它都让进化论显得足够强壮。

Never fully convinced that natural selection was sufficient to explain development, Huxley did accept that The Origin of Species (1859), a lantern in the dark world, made the case for evolution sufficiently strong even for an agnostic. Lines 3-6, Para.5

虽然从不完全信服自然选择就是进化的重要解释，赫胥黎还是接受了物种起源的学说，物种起源学说就犹如黑暗中的一盏明灯，照耀了进化论，如此耀眼以致影响了无可知论者。

Many postdarwinians doubt that natural selection alone is powerful enough to offset Carnot 's Second Law of Thermodynamics.

许多后达尔文主义者质疑自然选择本身是否能够强大到足以抵消卡诺的热力学第二定律。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。