音标：[,pri:'kә:sә]
n. 先驱者, 前导, 前兆
【化】 前体; 前身; 产物母体
【医】 先质, 前体(产物母体)
在线英汉词典

precursor的短语、例句：

precursor n (fml 文) ~(of sth) 1 person or thing that comes before sth; forerunner 先驱; 先行者; 先兆; 前兆
small disturbances that were precursors of the revolution to come 预示革命将爆发的小规模动乱. 2 machine or invention that is later developed further （机器或发明物的）初期形式
Thefirst telephone was the precursor of modern communications networks. 最早出现的电话是现代通讯网的雏型.