add-on
英 ['æd,ɒn]
美['æd,ɑn]
- n. 一种硬件设备（用于加在计算机上以扩展其功能）；追加
英英释意
- 1. a component that is added to something to improve it;
- "the addition of a bathroom was a major improvement"
- "the addition of cinammon improved the flavor"
- 2. a supplementary component that improves capability