by-product
/ˈbaɪprɔdʌkt; `baɪˌprɑdʌkt/ n
1 substance produced during the making of sth else 副产品
Ammonia, coal tar and coke are all by-products obtained in the manufacture of coal gas. 氨气、煤焦油、焦煤都是煤气生产过程中的副产品.
2 secondary result; side effect 连带的结果; 副作用
An increase in crime is one of the by-products of unemployment. 犯罪率增加是失业问题造成的一种恶果.