precursor
/.pri:'kә:sә/
托福GRE基础词汇
BNC词频: #10,361
当代词频: #9,664
中文释义
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