这些中产阶级专业人士经常寻求职业发展机会。

These ___middle-class professionals often seek career advancement opportunities.

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.

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.