预兆的用法和样例：
例句
-
乌云是雨或雪将至的预兆。
Dark clouds are a sign of rain or snow. -
预言者古罗马的预言者，尤指解释来自对鸟类的观察而得到的预兆的人
An augur of ancient Rome, especially one who interpreted omens derived from the observation of birds. -
（古罗马）占卜官古罗马宗教官员的一员，可通过观察并解释某些信号及预兆来预言事情
One of a group of ancient Roman religious officials who foretold events by observing and interpreting signs and omens. -
那是胜利的预兆。
It's an omen of victory. -
乌鸦是不祥的预兆。
The crow is a bird of ill omen.
