有备无患
- na.be prepared against want
- 网络Forewarned Is Forearmed; Good watch prevents misfortune; Readiness is all

有备无患
1.be prepared against want; Be prepared and you won't be sorry.; have a second string [two strings] to one's bow; If one is prepared, he will be safe.; Preparedness averts peril.; Preparedness [prevision] prevents calamity.; Where there is precaution there will be no danger.; With all precautions taken, one is safe.
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