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- Ammonia is a chemical substance. 氨是種化學(xué)物質(zhì)。
- A toxic chemical or other substance. 有毒的化學(xué)品或其它物質(zhì)
- A substance that retards or arrests a chemical reaction. 反催化劑延緩或阻礙化學(xué)反應的物質(zhì)
- To make(a chemical substance)nonvolatile or solid. 使不揮發(fā),使凝固使(某種化學(xué)物質(zhì))不揮發(fā)或凝固
- A chemical substance used to kill insects. 殺蟲(chóng)劑用于殺蟲(chóng)的一種化學(xué)物品
- A substance resulting from a chemical reaction. 生成物化學(xué)反應生成的物質(zhì)
- To make(a chemical substance) nonvolatile or solid. 使不揮發(fā),使凝固使(某種化學(xué)物質(zhì))不揮發(fā)或凝固
- A reactor is a container for chemical reaction. 反應器是進(jìn)行化學(xué)反應的容器。
- The chemical symbol for copper is "Cu". 銅的化學(xué)符號是Cu。
- We are doing a chemical experiment. 我們正在做化學(xué)實(shí)驗。
- My major is the subject of chemical engineering. 我的專(zhuān)業(yè)是化學(xué)工程學(xué)。
- A chemical change takes place in any substance when it burns. 物質(zhì)燃燒時(shí)產(chǎn)生化學(xué)變化。
- A chemical derived from petroleum or natural gas. 石油化學(xué)制品從石油或天然氣中提煉出的化學(xué)產(chǎn)品
- Beware how you handle the toxic chemical. 小心處理有毒的化學(xué)藥品。
- The chemical can behave as an acid. 這種化學(xué)制品能起酸的作用。
- Some chemical compounds can be resolved by heat. 一些化學(xué)化合物可以通過(guò)加熱分解。
- I am not familiar with chemical terms. 我不熟悉化學(xué)術(shù)語(yǔ)。
- He devoted his life to chemical research. 他一生從事化學(xué)研究。
- He is experimenting with a new chemical. 他正在實(shí)驗一種新的化學(xué)制品。
- The two elements are synthesized by a chemical process. 這兩種元素已經(jīng)化學(xué)合成。