know one's stuff
хорошо знать своё дело, хорошо ориентироваться
This woman knows her stuff and is a very skilled secretary.
Другие идиомы:
- know which side one's bread is buttered on
- know one's place
- know the score
- not know the first thing about something
- know when one is not wanted
- know-it-all
- know (something) backwards and forwards
- know which is which
- know-how
- know (something) by heart
- know (someone or something) like the back of one's hand
- know one's own mind
- know where all the bodies are buried
- not know if one is coming or going
- know all the tricks of the trade