precursor
.pri:'kә:sә
基本解释
n. 先驱者, 前导, 前兆
[化] 前体; 前身; 产物母体
英文释义
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
词形变化
上一个单词：precursive
下一个单词：precursor ion