“未雨绸缪”，汉语成语，意思是趁着天没下雨，先修缮房屋门窗（repair the house before it rains）。比喻事先做好准备工作，预防意外的事发生（take precautions beforehand，provide against the future，save (something) for a rainy day）。

例句：

我打算未雨绸缪，作好应对准备。

I'm trying to look ahead at what might happen and be ready to handle it.

目前还未出现这种情形，但我们需要未雨绸缪。

This has not happened yet. But we need to prepare.