by-product例句

You say you feel that you're being made to choose, and so you are. Such choices as this are a by-product of freedom.
你说自己感觉是在被迫作选择，确实如此，而这样的选择是自由的附带品。

The raw material for the tyre is a by-product of petrol refining.
制造轮胎的原材料是提炼汽油时产生的一种副产品。

Kerosene is a by - product of petroleum refining.
煤油是提炼石油的副产品.