中英成語俚語800對132：防患于未然

　　防患于未然

　　Prevention is better than cure.

　　Nip in the bud.

　　Crush in the egg.

　　To take precaution.

　　eg：Thieves is common in this area. Better lock the door as prevention is better than cure.

　　中英俚語俗語來源：漢書·外戚傳：“事不當(dāng)固爭，防禍于未然。”

　　同義詞：防微杜漸 A little fire is quickly trodden out.

　　反義詞：亡羊補(bǔ)牢 Lock the stable door after the horse is stolen.