一把钥匙开一把锁

一把钥匙开一把锁:

Literally means:

one key is just for one lock

Actually means:

use different methods to solve problem

One key cannot open other locks except its corre sponding lock.

It figuratively means different problems need to be solved with different methods.

It emphasizes that a particular object requires a particular method to deal with.

把钥匙只能打一把钥匙只能打开一把锁，不能打开其他的锁。

比喻不同的问题要用不同的方法去解决。

强调特定的对象要用特定的方法来处理才行。