menial

He started his career performing menial tasks like sweeping the floor and washing dishes.

(Chinese) 他从从事扫地和洗碗之类的卑微工作开始了他的职业生涯。

The software tycoon never forgot the menial summer jobs he held during his college years.

(Chinese) 这位软件大亨从未忘记他大学期间从事的那些卑微的暑期工。