raw material

Từ điển Oxford Advanced Learner 8th

ˌraw maˈterial 7 [raw material] BrE NAmE noun countable, uncountable
a basic material that is used to make a product
•We have had problems with the supply of raw materials to the factory.
•These trees provide the raw material for high-quality paper.
• (figurative)The writer uses her childhood as raw material for this novel.