0 If a period of time or series of events leads up to an event or activity, it happens until that event or activity begins. -- 为…作铺垫;是…的先导
The pilot had no recollection of the events leading up to the crash. 飞行员想不起飞机坠毁前发生了什么。
1 to prepare to talk about something by gradually mentioning the subject you want to talk about -- 缓慢过渡,慢慢引导
The moments leading up to the accident are very confused in my mind.
What exactly led up to his resignation?
They documented all the events leading up to the massacre.