supplement

/ˌsəpləˈmɛnt/

textual matter that is added onto a publication; usually at the end

中文释义：增刊；附录；补充物

The newspaper includes a weekly supplement on health and fitness.

这份报纸包含一份关于健康和健身的每周增刊。

The textbook comes with a supplement containing additional exercises.

这本教科书附带一份包含额外练习的附录。