dregs

咖啡壶里只剩下一些难喝的咖啡渣。

Only the bitter ___dregs of coffee remained in the pot.

啤酒杯底部的沉淀物影响了口感。

The ___dregs at the bottom of the beer glass affected the taste.

这些腐败官员是政治体系中最卑鄙的渣滓。

These corrupt officials are the ___dregs of the political system.