adj.中层社会的,中产阶级的;
例句:
The magazine is very middle-class.
这份杂志太古板了。
I was born to a middle-class family in Beijing.
我出生于北京一个中等家庭.
The current middle-class norm of two children per family.
现今每家两个孩子的 中产阶级 典型.