Fork in the road (noun) a time when you have to make a difficult decision about something, often involving options that may end up taking one in quite different directions.

决定性时刻/岔路口（名词）一个你不得不做出困难决定的时刻，往往会涉及最终可能会通往一个完全不同方向的选择。

“After graduating from university, I reached a fork in the road when I had to decide between going to Law school, or to Graduate school. It took me months to decide!”“大学毕业后，我面临着一岔路口，我必须在去读法学院或者去读研究生之间做出决定。我花了好几个月的时间才决定！”