The leftover solid bits at the bottom of a container after a liquid has been poured out.
After pouring the tea, only the dreg remained at the bottom of the cup.
倒出茶後,杯底只剩下茶渣。
The worst or least valuable part of something.
The dreg of society often faces the most hardship.
社會的渣滓往往面臨最多的困難。
The least important or least capable members of a group.
Only the dreg of the applicants were left after the first round of interviews.
第一輪面試後,只剩下申請者中的渣滓。