C1 noun /ˈrɛ.trəʊ.fɪt.ɪŋ/
retrofitting
为旧系统添加新技术或功能
Meaning
The addition of new technology or features to older systems.
Example
The building underwent retrofitting to meet new safety standards.
这座建筑通过加装 retrofit 来满足新的安全标准。