lead up to
1．approach indirectly 渐渐讲到；暗示
Anyone could see what he was leading up to．He wanted to borrow some money from us．谁都看得出他将要提到的是什么，他是要向我们借钱。
He led up to the question of money．他渐渐提到钱的问题。
What are you leading up to？你究竟想要说什么？
2． prepare the way for 为…铺路；引起；导致
These circumstances will lead up to war．这种形势会导致战争。
The series of events led up to his resignation．这一连串的事件导致了他的辞职。
The border conflict led up to an allround war between the two countries．边境冲突导致了两国间的全面战争。