劍橋詞典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）改型翻新，升級改造 A state program to retrofit engines with pollution controls has succeeded in reducing pollution from trains . 州政府對引擎加裝污染控制系統(tǒng)的計劃成功地降低了火車的污染狀況。 返回 retrofit