idiom · to plan ahead or prepare for a rainy day; to take precautions before trouble strikes

为了应对未来可能出现的经济波动，他决定未雨绸缪，开始储蓄。

idiom · the literal meaning from the Book of Songs: to bind window and door frames with silk before it rains

“未雨绸缪”的原意是指在下雨之前，把巢穴修补加固。