一把鑰匙開一把鎖

一把钥匙开一把锁
yībǎyàoshikāiyībǎsuǒ
  1. One key opens one lock.
  2. There is a different solution for each problem. (idiom)

CEDICT

Entry Composition

1 一把 yībǎ a bunch of; a bundle of
2 鑰匙 yàoshi key

classifier: 把
3 開 kāi
  1. to open (transitive or intransitive)
  2. (of ships, vehicles, troops etc) to start
  3. to turn on; to put in operation; to operate; to run
  4. to boil
  5. to write out (a prescription, check, invoice etc)
  6. (directional complement) away; off
  7. carat (gold)
  8. abbr. for Kelvin, 開爾文 Kāiěrwén
  9. abbr. for 開本 kāiběn, book format
4 一把 yībǎ a bunch of; a bundle of
5 鎖 suǒ to lock; to lock up

classifier: 把