“一箭双雕”比喻做一件事达到两个目的。

It means to achieve two goals with one action.

youdao

开始，人们用“一鼓作气”来比喻第一次鼓声促发的战斗力量是最强大的。后来，这句成语被用来比喻将一件事坚持做完，中间没有中断。

Originally, the idiom means "the fighting strength in the first drums is the highest." Later, it has been used to say "to press on to the finish without letup".

youdao

所以，也许另一件事现在也得以揭晓：档案必须烧毁（当然这是比喻），历史才能发生。

So perhaps another things is now revealed: archives must burn down (symbolically of course) for history to happen.

youdao