by-product
🇺🇸
/ˈbaɪ prɑːdʌkt/
🇬🇧
/ˈbaɪ prɒdʌkt/
Something made while making something else.
A common by-product of making cheese is whey.
制作奶酪的一个常见副产品是乳清。
Something that happens because of something else.
A rise in pollution is a by-product of the city's increased traffic.
污染的增加是城市交通增加的一个副产品。