chemical

的意思：化学的

的用法：作为形容词，用于描述与化学相关的事物或现象。

例句1：Chemical reactions occur when two or more substances combine to form new substances.（当两种或更多物质结合形成新物质时发生化学反应。）

例句2：The chemical properties of a substance determine how it will react with other substances.（物质的化学性质决定了它与其他物质如何反应。）

例句3：The laboratory is equipped with all the necessary equipment for conducting chemical experiments.（实验室配备了进行化学实验所需的所有设备。）

例句4：Chemical analysis is used to identify the composition and structure of unknown substances.（化学分析被用来确定未知物质的组成和结构。）

例句5：Many household cleaning products contain harsh chemicals that can be harmful to human health.（许多家庭清洁产品含有对人体健康有害的强烈化学物质。）

- Chemistry: the scientific study of the properties and behavior of matter （科学研究物质性质和行为的领域）

- Chemical compound: a substance formed by the chemical combination of two or more elements （由两种或更多元素通过化学反应组成的物质）

- Chemical element: a pure substance that cannot be broken down into simpler substances by chemical means （不能通过化学手段分解为更简单物质的纯物质）

- Chemical formula: a combination of chemical symbols and numbers used to represent the composition of a substance （用化学符号和数字组合表示物质组成的方法）

- Chemical reaction: the process by which one or more substances are changed into different substances （一种或多种物质被转化为不同物质的过程）