1. 化学元素：chemical contamination 化学污染 | chemical element 化学元素 | chemical emasculation 化学去雄

2. 化学成分：化学损伤:chemical damage | 化学成分:chemical element | 化学体系:chemical system

3. chemical element的反义词

3. 化学元素,化学成分：broadband network宽带网 | chemical element化学元素,化学成分 | study law学法律; by law根据法律;

4. 元素：Biochemistry Category:生物化学 | Chemical Element 元素 | Chemical Engineering Category:化学工程

1. any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

    Synonym: element