adj.毫无用处的;
例句:
I'm no good at writing; you'll have to find someone who is.
我这支秃笔不行, 得找个笔杆子.
That child is always crying for no good reason.
那个孩子总是无缘无故地哭.
This spade is no good. I'll go and get another one.
这铁锹不中用, 我去换一把吧.