add-on
英 ['?d,?n]
美['?d,ɑn]
- n. 一種硬件設備（用于加在計算機上以擴展其功能）；追加
英英釋意
- 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