1、a member of the working class (not necessarily employed)
工人階級(jí)的成員（不是必需的雇員）。

2、a member of the working class (not necessarily employed).
工人階級(jí)的成員（不是必需的雇員）。

3、It is the working class that is most selfless.
工人階級(jí)最大公無私。

4、A quarter of the working class voted for him.
1/4的工人階級(jí)給他投了票。

working class翻譯