The Mole knew well that it is quite against animal-etiquette to dwell on possible trouble ahead, or even to allude to it; so he dropped the subject.

• 鼹鼠知道，老是谈论将来可能发生的麻烦事，哪怕只提一下，都不合乎动物界的礼仪规范，所以，他抛开了这个话题。