add-on
参考词典中add-on的常规释义：
基本释义
- adj. 附加
词形变化
- 形容词：add'-in'
常用短语
- add on
另外加上去
- add on
英英解释
2个名词解释
- a component that is added to something to improve it
[同] improver, addition, add-on
[例]- the addition of a bathroom was a major improvement
- the addition of cinnamon improved the flavor
- a supplementary component that improves capability
[同] accessory, add-on, appurtenance, supplement
点击查看……- a component that is added to something to improve it
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