ret·ro·fit /ˈrɛtroˌfɪt, ˌrɛtroˈfɪt/
  修正;更新;改進
  retrofit
  修整
  retrofit
       n 1: a component or accessory added to something after it has
            been manufactured
       2: the 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"
       v 1: 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"
       2: fit in or on an existing structure, such as an older house;
          "The mansion was retrofitted with modern plumbing"
       3: substitute new or modernized parts or equipment for older
          ones; "The laboratory retrofitted to meet the safety
          codes"
       [also: retrofitting, retrofitted]