名词

1.不可数名词：加；加法

2.可数名词：增加物；添加物

3.不可数名词：增加；添加

词形变化

形容词additional

副词additionally

单词分析

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、报等正广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。

英语解释

a suburban area laid out in streets and lots for a future residential area

something added to what you already have

a quantity that is added

the act of adding one thing to another

a component that is added to something to improve it

the arithmetic operation of summing; calculating the sum of two or more numbers