1. 转折点;转机
A turning point is a time at which an important change takes place which affects the future of a person or thing.
1. the intersection of two streets
e.g. standing on the corner watching all the girls go by
Synonym: cornerstreet corner
2. an event marking a unique or important historical change of course or one on which important developments depend
e.g. the agreement was a watershed in the history of both nations