单词详解

n.

A. 化学 [U] (scientific study of the structure of substance, how they react when combined or in contact with one another, and how they behave under different conditions)

Chemistry is my favorite subject at school. 上学时，我最喜欢化学。

B. 化学性质，化学组成和反应 [U] (chemical structure, properties and reactions of a particular substance)

Our teacher is knowledgeable about the chemistry of metals.

我们老师对金属的化学性质知之甚多。