chemical drying

例句：

1. 1. The chemical reaction is very complex.
   化学反应非常复杂。
2. 2. Chemistry is the study of matter and energy.
   化学是研究物质和能量的学科。
3. 3. The chemical composition of the substance was determined by the test.
   通过测试确定了这种物质的化学成分。