chemical raw materials

• 化工原料

chemical raw materials的用法和样例：

例句

1. Carboxylic acid esters are important chemical raw materials.
   羧酸酯是重要的化工原料。
2. Petroleum gas can be used as fuel as well as a chemical material.
   石油气既可以用作燃料又可以用作化工原料。