precursors的翻译，读音
英/pri:'kɜ:səz/
释义：
n. 先驱( precursor的复数形式 ); 先行者; 先兆; 初期形式
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
n. something that precedes and indicates the approach of something or someone
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
n. something that precedes and indicates the approach of something or someone