teach an old dog new tricks

释义

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

   老大（不）可教；（无法）改变人们长时间形成的思想（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

同一词条的短语

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