don't try to teach grandma how to suck eggs

短语

不要班门弄斧

释义与例句

prov.
  1. 1.

    Don't presume to give advice to those who are more experienced.

    不要班门弄斧

词源

From a 1707 translation by John Stevens of comical works of Francisco de Quevedo (1580 – 1645). "You would have me teach my Grandame to suck Eggs"

来源：wiktionary