Parks are to the city_____lungs are to the body中间填什么
问题描述：
Parks are to the city_____lungs are to the body中间填什么
答
我新加坡来的：while
答
and两个句子是并列的。
答
what 这是一个句型.A is to B what C is to D.A 对于 B而言正如C对于D一样