防患未萌[fáng huàn wèi méng]
词典nip in the bud：杜渐防微；防患未萌；把…消灭于萌芽状态， 防…于未然；遏其萌芽。
词典before any mischief is done：防患未萌。
词典destroy at an early stage：防患未萌。
词典stifle in the cradle：把…扼杀在摇篮里；防患未萌。
防患未萌[fáng huàn wèi méng]
nip in the bud; before any mischief is done; destroy at an early stage; stifle in the cradle