一把鑰匙開一把鎖 [ㄧ ㄅㄚˇ ㄧㄠˋ ˙ㄕ ㄎㄞ ㄧ ㄅㄚˇ ㄙㄨㄛˇ; yi1 ba3 yao4 shi5 kai1 yi1 ba3 suo3] One key opens one lock. There is a different solution for each problem. (idiom) ◄ ►