出自汉·桓宽《盐铁论·后刑》。锄去田里有害的杂草,禾苗就可以健康地生长;惩罚为非作歹的恶人,百姓就会感到喜悦。
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.