chemene

例句：

1. 1. The chemist analyzes the chemical properties of substances.
   化学家分析物质的化学性质。
2. 2. Chemistry is the study of matter and its properties.
   化学是研究物质及其性质的学科。
3. 3. The discovery of new elements has revolutionized our understanding of the universe.
   发现新元素已经改变了我们对宇宙的理解。