for emergency needs; provide against a rainy day

• 以备不时之需

for emergency needs; provide against a rainy day的用法和样例：

例句

1. He has a little money put aside for a rainy day.
   他积蓄了一点钱以备不时之需。
2. They kept a supply of canned food at hand.
   他们准备了一批罐装食品，以备不时之需。