n.先驱；前任；前兆；[生物]前体，前驱体
用作名词 (n.) The precursor of the modern car was a horseless carriage with a petrol engine.
现代汽车的前身是不用马拉的，装有汽油发动机的车子。
Her precursor as school principal was an eminent educator.
她任校长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.
殖民地居民对英国不公正税收的反抗预示着革命的到来。
Lysine is a precursor of certain alkaloids.
赖氨酸是某些生物碱的前体。
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