adj.额外的，附加的,另外的，追加的,补充,外加
Shares and bonds can bring one quite a considerable additional income.
股票和债券能给人带来不菲的额外收入。
There are additional publications of special relevance to new graduates.
还有对于新毕业生来说特别重要的其他出版物。
Provide them with additional background or with supplementary information.
给他们提供额外的背景资料或补充信息。