副產品的用法和樣例：
例句
-
家庭用的許多新東西已作為宇航機械的副產品被生產出來。
Many new things found useful in the home have spun off from the machinery of space travel. -
這種新材料是航天工業的副產品。
This new material is a spin-off from the space industry. -
氨氣、煤焦油、焦煤都是煤氣生產過程中的副產品。
Ammonia, coal tar and coke are all by-products obtained in the manufacture of coal gas.
