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22-04-02 有备无患,汉语成语,字面意思是where there is precaution, there is no danger,表示事先有准备,就可以避免祸患。可以翻译为readiness is all,have a second string to ones bow等。 例句: 你最好带把伞,有备无患。 youd better take an umbrella just in case....