where there are three men walking together,one of them must qualified to be my teacher.
三個臭皮匠，頂個諸葛亮
three cobblers,with their wits combined,surpass Zhuge Liang,the mastermind-the wisdom of the masses exceeds that of the wisest individual.
投鼠忌器
hesitate to pelt a rat for fear of smashing the dishes-hold backfrom taking action against an evildoer for fear of involving good people
沒齒不忘
remember for the rest of one's life:will never forget to the end of one's days
平生不做虧心事，半夜竅門心不驚
if you have a clear conscience,you'll not be startled when hearing knocks at the door at midnight; a clear conscience laughs at false accusations
是作業嗎？以後還是要靠自己想哦！