middle-class

中产阶级的选票在民主选举中至关重要。

The ___middle-class vote is crucial in democratic elections.

中产阶级家庭经常投资于私人辅导。

___middle-class households often invest in private tutoring.

许多中产阶级家庭为社区慈善机构捐款。

Many ___middle-class households contribute to community charities.