The question is how we can makeit known to everyone how serious the population problem is.句子中的m
问题描述：
The question is how we can makeit known to everyone how serious the population problem is.句子中的m
该句中的make it known
答
问题是我们如何让大家知道人口问题是何等的严重.
it是形式宾语,在这指how serious the population problem.