ADJ 化学的;化学反应的;用化学方法生成的 Chemical means involving or resulting from a reaction between two or more substances, or relating to the substances that something consists of.
...chemical reactions that cause ozone destruction. 导致臭氧受到破坏的化学反应
...the chemical composition of the ocean. 海洋的化学成分
...chemical weapons. 化学武器
N-COUNT 化学品;化合物;化学制品 Chemicals are substances that are used in a chemical process or made by a chemical process.
The whole food chain is affected by the overuse of chemicals in agriculture. 整个食物链因农业生产过程过多使用化学品而受到影响。