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) from memory
- know (someone) by sight
- know which is which
- know (something) backwards and forwards
- know when one is not wanted
- know one's own mind
- know what's what
- know a trick or two
- know all the tricks of the trade
- know where (someone) stands on (something)
- know which side one's bread is buttered on
- know a thing or two (about someone or something)
- not know the first thing about something
- know the ropes
- not know if one is coming or going