census

n. 户口普查
v. 实施统计调查

The census is taken one time every four years in our country.

我国每四年一次人口普查。

One authority on spiders made a census of the spiders in a grass field in the south of England

一位研究蜘蛛的权威对英国南部的一块草坪上的蜘蛛作了一次统计。