Noun:
a component or accessory added to something after it has been manufacturedthe act of adding a component or accessory to something that did not have it when it was manufactured;the court ordered a retrofit on all automobiles
Verb:
provide with parts, devices, or equipment not available or in use at the time of the original manufacture;They car companies retrofitted all the old models with new carburetors
fit in or on an existing structure, such as an older house;The mansion was retrofitted with modern plumbing
substitute new or modernized parts or equipment for older ones;The laboratory retrofitted to meet the safety codes
retrofit testing改进测试
动词57%,名词43%