一把钥匙开一把锁

Traditional (Taiwan): 一把鑰匙開一把鎖

yàoshikāisuǒ ㄧ ㄅㄚˇ ㄧㄠˋ ˙ㄕ ㄎㄞ ㄧ ㄅㄚˇ ㄙㄨㄛˇ

    • One key opens one lock.
    • There is a different solution for each problem. (idiom)

Character by character

Sources