addition

addition, appendix, attachment, supplement, accessory

这些名词均含“附加物、增加物”之意。
addition: 仅强调数量的增加。
appendix: 指书末的附录。
attachment: 指用于扩大原物用途的附件。
supplement: 主要指使书、报等正文更完善而额外增加的部分。
accessory: 作“附件”解时，与attachment同义，可互换，但还指增加美观的附属品。

名词 addition:

1. a component that is added to something to improve it
   同义词：add-on, improver
2. the act of adding one thing to another
3. a quantity that is added
   同义词：increase, gain
4. something added to what you already have
   同义词：accession
5. a suburban area laid out in streets and lots for a future residential area
6. the arithmetic operation of summing; calculating the sum of two or more numbers
   同义词：summation, plus

1. In addition to a diet, she pursues various exercises on TV.
   节食以外她还随电视做体操。
2. In addition to an album, I gave him a pen and a pencil.
   除了一本照相簿外，我还给了他一支钢笔和一支铅笔。
3. Addition and division are forms of computation.
   加法和除法都是计算方法。
4. Ann will be a very useful addition to our team.
   安来到我们队给我们增加了一员干将。
5. The little girl is not very clever at addition.
   这个小女孩不太善于做加法。
6. In addition to giving a general introduction to computer, the course also provides practical experience.
   课程除了一般介绍电脑知识外，还提供实际操作的机会。