n.先驅(qū)；前任；前兆；[生物]前體，前驅(qū)體

Her precursor as school principal was an eminent educator. 她任校長前是一位卓越的教育家。

Opposition by colonists to unfair taxation by the British was a precursor of the Revolution. 殖民地居民對英國不公正稅收的反抗預(yù)示著革命的到來。

Lysine is a precursor of certain alkaloids. 賴氨酸是某些生物堿的前體。

前驅(qū)體

adj.先驅(qū)的；前兆的；作預(yù)備的