middle class
noun /ˌmɪdl ˈklɑːs/
/ˌmɪdl ˈklæs/
[countable + singular or plural verb]- the social class whose members are neither very rich nor very poor and that includes professional and business people
中产阶级;中等收入阶层 - the upper/lower middle class
中等偏上/偏下收入阶层 - the growth of the middle classes
中产阶级的壮大
- the upper/lower middle class