她作为一名博士却在咖啡店打工，显然是大材小用了。

With a PhD degree, she feels ___underemployed working as a barista.

尽管他有硕士学位，但由于经济不景气，他只能找到兼职工作，处于半失业状态。

Despite having a master's degree, he is ___underemployed and can only find part-time jobs due to the economic downturn.