务必英语短语怎么说（以备不时之需用英文如何表达）(1)

for unexpected needs 以备不时之需

against a rainy day 以备不时之需，未雨绸缪

双语例句：

We all need some savings against a rainy day.

我们都需要储蓄一些钱以备不时之需。

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