?的意思：化學的

的用法：作為形容詞，用于描述與化學相關的事物或現象。

例句1：Chemical reactions occur when two or more substances combine to form new substances.（當兩種或更多物質結合形成新物質時發生化學反應。）

例句2：The chemical properties of a substance determine how it will react with other substances.（物質的化學性質決定了它與其他物質如何反應。）

例句3：The laboratory is equipped with all the necessary equipment for conducting chemical experiments.（實驗室配備了進行化學實驗所需的所有設備。）

例句4：Chemical analysis is used to identify the composition and structure of unknown substances.（化學分析被用來確定未知物質的組成和結構。）

例句5：Many household cleaning products contain harsh chemicals that can be harmful to human health.（許多家庭清潔產品含有對人體健康有害的強烈化學物質。）

同義詞及用法：

- Chemistry: the scientific study of the properties and behavior of matter （科學研究物質性質和行為的領域）

- Chemical compound: a substance formed by the chemical combination of two or more elements （由兩種或更多元素通過化學反應組成的物質）

- Chemical element: a pure substance that cannot be broken down into simpler substances by chemical means （不能通過化學手段分解為更簡單物質的純物質）

- Chemical formula: a combination of chemical symbols and numbers used to represent the composition of a substance （用化學符號和數字組合表示物質組成的方法）

- Chemical reaction: the process by which one or more substances are changed into different substances （一種或多種物質被轉化為不同物質的過程）