In that era you also had your upper-middle class and your lower-upper class and off on the side were the collar classes, white and blue.

在那个时代，中产阶级也有上部下部之分。此外，也可以分为白领阶级和蓝领阶级。

youdao

In that era you also had your upper-middle class and your lower-upper class and off on the side were the collar classes, white and blue.

在那个时代，中产阶级也有上部下部之分。此外，也可以分为白领阶级和蓝领阶级。

youdao