cur＝to run（流；跑） 变化型 course
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.
[Date: 1500-1600; Language: Latin;Origin: praecursor, from praecurrere 'to run in front']
formal something that happened or existed before something else and influenced its development
a precursor of modern jazz