英語裏面population是可數名詞，意思和例句如下：
N-COUNT?The?population?of a country or area is all the people who live in it. 人口
例：
Bangladesh now has a population of about 110 million.?
孟加拉國現有約壹億壹千萬人口。
例：
...the annual rate of population growth.?
…人口年增長率。
N-COUNT?If you refer to a particular type of?population?in a country or area, you are referring to all the people or animals of that type there. (某種) 人群; 種群
例：
...75.6 percent of the male population over sixteen.?
…16歲以上男性人群的75.6％。
例：
...areas with a large black population.?
…有大批黑人群體的的各地區。