supplement
/ˈsʌplɪmənt; `sʌpləmənt/ n
1 ~ (to sth) thing added to sth else to improve or complete it 增补的事物; 补充
The money I get from teaching the piano is a useful supplement to my ordinary income. 我教钢琴挣的钱是一笔很管用的外快.
2
(a) ~ (to sth) book, section of a book, etc that gives further information, treats a special subject, etc （书等的）补编, 补遗, 附录
the supplement to the Oxford English Dictionary 《牛津英语大辞典》补编.
(b) additional section added to a newspaper （报纸的）增刊
the colour supplements of the Sunday newspapers 星期日报纸的彩色增刊.
3 extra amount of money paid for an additional service, item, etc （为增加的服务、 项目等支付的）额外费用, 附加费
a 10 supplement for a single room with a shower 带淋浴间的单人房间需付10英镑附加费.
supplement / ˈsʌplɪment; `sʌpləˌmɛnt/ v [Tn, Tn.pr]
~ sth (with sth) add to or complete sth with sth else 增加或补充某事物
I supplement my grant by working in the evenings. 我除享受助学金外还打夜工以增加收入.
She supplements her diet with vitamin tablets. 她服用维生素片剂以补充规定食谱中的营养.