by-product的复数形式怎么写

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...

n.副产品，副作用，意外结果...

by-product的音标：by-product的英式发音音标为：[baɪ 'prɒdʌkt]by-product的美式发音音标为：['baɪˌprɑdəkt]...