n.(置于流水中的)拦渣板
That's a scummy trick.
那是一种卑鄙的伎俩.
I don't like walking through the scummy part of town.
我不喜欢走过城里的下层居民区.
A scummy sterility hanging over the town, a fog of book - learning.
这座城镇笼罩在一种卑下的贫乏和啃书本的浓雾中,学的全是以往的渣滓.