Bark may be used as raw material for paper-making.

树皮可以做造纸的原料。

《新英汉大辞典》

Silica gel was used as raw material of insoluble bactericides.

采用硅胶作为水不溶性杀菌剂的载体；

youdao

Red date was used as raw material in lactic acid bacteria fermentation research.

以红枣为原料，用经驯化的乳酸菌发酵制成红枣乳酸发酵饮料。

youdao

But it, like many other chemical companies, feel the pain more acutely because petroleum is used as a raw material and to transport their goods.

FORBES: Magazine Article

Like many chemical companies, Huntsman suffered from rapidly escalating petroleum costs, which is used as a raw material, to power its processes and transport its goods.

FORBES: Market Scan

But some are also thought to harbour water ice, which could be used as a raw material for the manufacture of rocket propellant or even breathable air.

BBC: New venture 'to mine asteroids'