先行官的英文：
harbinger
n. 预兆；预告者；先驱
v. 预告
The sword is a harbinger of enmity and bitterness.
刀剑预示着仇恨和痛苦。
What about commodity prices as a harbinger of inflation?
那么，商品价格是不是通货膨胀的前兆？
The November air stung my cheeks, a harbinger of winter.
11月的空气刺痛了我的脸颊，预示着冬天就要来临。
The Paris Commune will be for ever celebrated as the glorious harbinger of a new society.
巴黎公社将永远作为新社会的光辉先驱受人歌颂。