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- By this means, the population adapts genetically to its circumstances. 用这种方法，群体对它的环境产生遗传适应。
- Darwin explained how populations adapt to their environments, but Earth is a moving target, continually changing in response to both physical and biological forcings. 达尔文解释种群如何适应环境，但地球是一个移动的目标，因对自然界和生物两者施加的压力做出反应而不断发生变化。
- This city has a population of more than 1,000,000. 这个城市人口超过一百万。
- A desert has no settled population. 沙漠没有固定的居民。
- There was a steady increase in population. 人口在不断增长中。
- What is the population of this country? 这个国家的人口是多少？
- Disease has decimated the population. 疾病使大部分人死亡。
- The population of the island has sunk from100 to20. 这个岛上的人口从容不100人减少到了20人。
- What is the population of Ireland? 爱尔兰人口有多少?
- There was a swell in the city's population. 该市出现过人口膨胀。
- The smallest taxonomic subdivision of an ecospecies, consisting of populations adapted to a particular set of environmental conditions. The populations are infertile with other ecotypes of the same ecospecies. 生态型生态种的最小划分单位，由适应某一特定环境条件的群体组成。这些群体与其他同种异型的物种不能杂交
- In ten years the city's population expanded by 12%. 十年之中,该城人口增加了百分之十二。
- The population of this country rose by 10 percent. 这个国家的人口增长了百分之十。
- What is the total population of Japan? 日本的总人口为多少?
- The smallest taxonomic subdivision of an ecospecies,consisting of populations adapted to a particular set of environmental conditions. The populations are infertile with other ecotypes of the same ecospecies. 生态型生态种的最小划分单位，由适应某一特定环境条件的群体组成。这些群体与其他同种异型的物种不能杂交。
- The town has a population of ten thousand. 这个镇有一万人口。
- Our population is concentrated in the big cities. 我国人口集中在大城市里。
- The country has a population of 100 million. 这个国家有一亿人口。
- The population in this area has increased fourfold. 该地区的人口已增加到四倍。
- The elephant population in that area is falling. 那个地区的大象总数在下降。
