add-on hardware添加硬件;附加硬件
add-on therapy添加疗法;添加治疗;辅助治疗
Add-on manager附加组件管理器;加载项管理;扩展管理器;插件管理器
add-on memory[计] 添加存储器;翻译
add-on rate附加利率;另加利率;附加利息;翻译
add-on plan附加福利计划;附加型弹性福利计画;福利计画;附加补偿计划
Browser Add-on浏览器插件
TO add-on要加载项;对附件;附加
Add-on item属于加购计划商品
N-COUNT（可数名词） An add-on is an extra piece of equipment, especially computer equipment, that can be added to a larger one which you already own in order to improve its performance or its usefulness. (尤指电脑的) 附带装置
To use this software, you don't need a CD-ROM drive or any expensive add-ons for your computer.
使用这种软件，你不需要为你的电脑装光盘驱动器或者任何昂贵的附带装置。