a possible period of want or need; a nest egg; emergency needs; in case of need (/emergency/contingency); make provision against contingencies; (money) for exigencies;occasional use; things which may be needed any time
❍ 你最好把这笔钱存起来，以备～。You’d better put this sum of money in the bank to provide against a rainy day.
不时之需bù shí zhī xū
不时：随时可能。说不定什么时候就需要。a possible period of want or need, in case of need, a nest egg, things which may be needed anytime