许多高技能工人不得不接受低技能工作，这导致了严重的隐性失业问题。

Many skilled workers have to take low-skilled jobs, which leads to serious ___underemployment.

许多兼职员工都面临就业不足的问题，希望能有更多工作时间。

Many part-time workers face ___underemployment and wish they could work more hours.