Constant effort

Constant

Be keen to do sth

Poor match

frequent

Revenue

Convince

Convincing

Yet later on, the more affluent children end up in college and on the way to the middle class, while working-class children tend to struggle.

但后来, 更富裕的孩子最终上了大学，走上了中产阶级的道路，而工薪阶层的孩子往往很挣扎。

Interim=temporary;