supplementary

音标[,sʌpli'mentәri]

汉语翻译

a. 补足的, 补充的, 追加的
【经】追加的, 补充的, 增补的

这些形容词均有“另加的，额外的”之意。
additional: 由名词additon派生出的形容词，指在原有基础上添加上去的。
extra: 指不包括本身而额外加上去的部分。
supplementary: 由名词supplement派生而来，指对原有的追加或补究。

functioning in a subsidiary or supporting capacity
同义词：auxiliary, subsidiary, supplemental
added to complete or make up a deficiency
同义词：supplemental

A book or bound collection of maps, sometimes with supplementary illustrations and graphic analyses.
地图册，图表集将地图装订而成的书册，有时附有增补说明或图表分析
Journalism in which a news story is presented primarily through photographs with supplementary written copy.
摄影新闻(工作), 摄影图片报道主要通过照片和附加书面注释来报导新闻的报刊杂志
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。
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。