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汉语拼音：wèi rán

还没有成为事实：防患于～。

1. 还没有成为事实。

   《韩非子·难四》：“未知 齐 之巧臣，而废明乱之罚；责以未然，而不诛昭昭之罪。此则妄矣。”《汉书·赵充国传》：“臣恐 羌 变未止此，且復结联他种，宜及未然为之备。” 颜师古 注：“未然者，其计未成。” 宋 曾巩 《请西北择将东南益兵札子》：“其於东南之兵……使缓急足用，以销奸萌，除患於未然，亦治体之所宜及。” 清 恽敬 《蝃蝀说》：“是故刑，禁之于已然；礼，制之于将然；诗，防之于未然。”

2. 不是这样；并非如此。

   汉 阮瑀 《为曹公作书与孙权》：“以君之明，观孤术数，量君所据，相计土地，岂势少力乏，不能远举，割 江 之表，宴安而已哉？甚未然也。” 明 胡应麟 《少室山房笔丛·丹铅新录二·鬼方》：“ 鬼方 ，前辈有以为 楚 者……《竹书》伐 鬼方 之上，有次 荆 之文，此説宜可证。 杨 云极远，恐未然。”

3. 指不正确，不对。

   宋 陆游 《老学庵笔记》卷九：“衣冠近古，正儒者事，讥者固非，辨者亦未然也。” 明 王守仁 《大学问》：“如子之説，以新民为亲民，则本末之説，亦有所未然歟？”

• The British never awaken to peril until it is almost too late.

  英国人从来不懂得防患于未然。

• To forestall is better than to amend.

  与其补救于已然,不如防范于未然.

• If I don't nip it in the bud, he'll keep doing it.

  如果我不防患于未然, 他会继续干这种事的.

• Guessing his intentions, she had resolved to nip them in the bud.

  她猜到他的用意之后, 就决定防患于未然,使之不能实现.

• They should have taken precautions against the problem from happening.

  要防范未然.

• Guessing his intentions, Ann had resolved to check them in the bud.

  安猜到他的用意之后, 决定防患于未然,使之不能实现.

• Florence Nightingale was basically arguing for prevention rather than cure.

  弗洛伦斯·南丁格尔的基本主张是防患于未然.

• Health warning: take stress seriously and dealitit deals with you!

  健康警告: 要认真对待压力,防患于未然!

• It is best to prepare for the days of necessity.

  未雨绸缪,才能防患于未然.

• B I know. Better safe than sorry, as they say.

  B我知道. 就像人们说的,防患于未然.

• We should take preventive measures to guard against possible trouble.

  我们应当采取必要的措施,防患于未然.

• One must prevent oneself from catching the flu.

  预防流感,一定要防患于未然.

• He is wise that is ware in time.

  聪明人防患于未然.

• Many accidents can thus be forestalled.

  好多事故都要防患于未然.

• To forestall is better than to amend . or Prevention is better than cure.

  与其补救于已然,不如防患于未然.