know one's stuff
хорошо знать своё дело, хорошо ориентироваться
This woman knows her stuff and is a very skilled secretary.
Другие идиомы:
- know (something) in one's bones
- not know the first thing about something
- know where (someone) stands on (something)
- know better (than to do something)
- know-it-all
- know the ropes
- know one's own mind
- know-how
- know (something) only too well
- know one's place
- know (something) from memory
- know which side one's bread is buttered on
- know what's what
- know a thing or two (about someone or something)
- know (something) by heart