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新东方-柯林斯雅思备考词典
by-product
[NOUN]
by-products
1. [C 可数名词] 副产品
A by-product is something that is produced during the manufacture or processing of another product.
双语例句
例：The raw material for the tyre is a by-product of petrol refining.
这种轮胎的原料是汽油提炼的副产品。