teach an old dog new tricks

釋義

1. (you can't) teach an old dog new tricks

   老大（不）可教；（無法）改變人們長時間形成的思想（或做事方法等）

   (you cannot) successfully make people change their ideas, methods of work, etc., when they have had them for a long time

同一詞條的短語

• teach your grandmother to suck eggs
• teach to the test