音标：[.pri:'kә:sә] ；柯林斯词典等级：1 级；

n. 先驱者, 前导, 前兆
[化] 前体; 前身; 产物母体

n. a substance from which another substance is formed (especially by a metabolic reaction)
n. a person who goes before or announces the coming of another

词型变化：名词复数形式 : precursors
考试类型：[托福/GRE]

词性分布：

名词100%

precursor的用法和样例：

例句

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。

词汇搭配

cartilaginous precursor前软骨
precursor fault初始断层
vitamin precursor维生素原
precursor cell前体细胞
precursor relation前身关系
specific precursor特异性前体
precursor substance产物母体,先质,前身...
enzyme precursor酶的前体
milk precursor乳前体物
angiotonin precursor[医] 血管紧张素前...
earthquake precursor地震先兆现象...
precursor chain前身链

经典引文

Infantile fears..are the precursors of many..anxieties entertained by adults
出自：E. H. Erikson
There is no evidence that Jesus, or his precursor John, taught pacifism as such.
出自：A. N. Wilson

【近义词】

ancestor祖宗
antecedent前情
forerunner先驱
predecessor祖先
herald使者
pioneer先锋
original原始的
originator创始人
parent父母
sign手势
foundation根基
leader领袖
foretaste预示
harbinger先驱

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