剑桥词典to provide a machine with a part , or a place with equipment , that it did not originally have when it was built 使（機器）改型繙新，陞級改造 A state program to retrofit engines with pollution controls has succeeded in reducing pollution from trains . 州政府對引擎加裝汙染控制系統的計劃成功地降低了火車的汙染狀況。 返回 retrofit