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- Ammonia is a chemical substance. 氨是种化学物质。
- A toxic chemical or other substance. 有毒的化学品或其它物质
- A substance that retards or arrests a chemical reaction. 反催化剂延缓或阻碍化学反应的物质
- To make(a chemical substance)nonvolatile or solid. 使不挥发,使凝固使(某种化学物质)不挥发或凝固
- A chemical substance used to kill insects. 杀虫剂用于杀虫的一种化学物品
- A substance resulting from a chemical reaction. 生成物化学反应生成的物质
- To make(a chemical substance) nonvolatile or solid. 使不挥发,使凝固使(某种化学物质)不挥发或凝固
- A reactor is a container for chemical reaction. 反应器是进行化学反应的容器。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- We are doing a chemical experiment. 我们正在做化学实验。
- My major is the subject of chemical engineering. 我的专业是化学工程学。
- A chemical change takes place in any substance when it burns. 物质燃烧时产生化学变化。
- A chemical derived from petroleum or natural gas. 石油化学制品从石油或天然气中提炼出的化学产品
- Beware how you handle the toxic chemical. 小心处理有毒的化学药品。
- The chemical can behave as an acid. 这种化学制品能起酸的作用。
- Some chemical compounds can be resolved by heat. 一些化学化合物可以通过加热分解。
- I am not familiar with chemical terms. 我不熟悉化学术语。
- He devoted his life to chemical research. 他一生从事化学研究。
- He is experimenting with a new chemical. 他正在实验一种新的化学制品。
- The two elements are synthesized by a chemical process. 这两种元素已经化学合成。