3 sentences

1. 橡胶是制造轮胎的主要原料。

   xiàng​jiāo shì zhì​zào lún​tāi de zhǔ​yào yuán​liào.

   Rubber is the main raw material for manufacturing tires.

   Source: Dong Chinese Dictionary

2. 氧化铝是一种重要的工业原料。

   yǎng​huà​lǚ shì yī zhǒng zhòng​yào de gōng​yè yuán​liào.

   Aluminum oxide is an important industrial raw material.

   Source: Dong Chinese Dictionary

3. 这种香烟主要使用优质烤烟作为原料。

   zhè zhǒng xiāng​yān zhǔ​yào shǐ​yòng yōu​zhì kǎo​yān zuò​wéi yuán​liào.

   This cigarette mainly uses high-quality flue-cured tobacco as a raw material.

   Source: Dong Chinese Dictionary