precursor
英 [pr?'k??s?]
美[pri'k?s?]
- n. 先驅(qū)，前導(dǎo)
英英釋意
- 1. a substance from which another substance is formed (especially by a metabolic reaction)
- 2. a person who goes before or announces the coming of another
- 3. an indication of the approach of something or someone