supplementary

a. 补充的,附加的

A supplementary grant may be awarded at the discretion of the committee.

委员会可能酌情追加一笔补助金.

A supplementary set of keys, usually numerical and arranged like a calculator, added to a keyboard.

一组增设的键盘，通常是数字型的，其排列方式与计算器的排列方式相似，附设在主键盘上。