know which is which
суметь различить, отличить одно от другого
Mark's house and Peter's house are so alike that I am often confused and don't know which is which.
Другие идиомы:
- know where (someone) stands on (something)
- know one's own mind
- know (someone) by sight
- know-how
- know (something) backwards and forwards
- know the ropes
- know (something) in one's bones
- know what's what
- know (someone or something) like the back of one's hand
- know (something) only too well
- know one's place
- know where all the bodies are buried
- not know the first thing about something
- know all the tricks of the trade
- know when one is not wanted