populations

Figure 1.15 shows which provinces lost populations between 1910 and 1920.

表1.15显示出哪些省份在1910至1920年间人口减少了。

Leaving some fields fallow provided a natural check on insect populations.

让一些土地休耕是自然控制昆虫数量的办法.

Populations tend to grow at an exponential rate.

人口趋向于以指数比率增长.

The Croatian town of Ilok is a classic case of shifting populations.

伊洛卡的克罗地亚小镇就是人口不停流动的典型例子。

The ethnic populations are so intermingled that there's bound to be conflict.

各民族人口如此杂居，肯定会发生冲突。

Fish populations assume highly localized distributions within each river.

鱼群分布集中在每条河的某些区域.

Interesting distinctions can be drawn between the two populations.

比较两类人可以发现有趣的差异。

Not much information is available about the structure of populations of earthworms.

关于蚯蚓种群结构方面有价值的报道不多.

These large populations facilitate the detection of rare mutational or recombinational events.

这样的大群体有利于检出稀有的突变或重组子.

Nonexposure of susceptible plant populations to their pathogens is fairly common.

感病的植物群体不暴露在它们的病原之下,这是相当普遍的.

History is replete with examples of populations out of control.

历史上人口失控的例子比比皆是。

Wild populations of trees usually carry a large " genetic load ".

树木的野生群体往往具有大量的 “ 遗传负荷. ”

We study samples in order to be able to describe populations.

为了了解总体,必须研究样本.

At high populations aggressive individuals will be relatively more fit.

在高的种群中,侵犯性个体将有更强的适应性.

As populations increase, the demand for water grows accordingly.

随着人口的增长, 用水量也相应增加.