儿童占世界人口的很大一部分。

Children make up a large ___proportion of the world's population.

这个班级的男女生比例大致相等。

The class consists of men and women in roughly equal ___proportions.

调查对象中有相当一部分人赞扬了该公司的客户服务。

A significant ___proportion of those surveyed praised the company's customer service.