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(jī)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(tǒng)的計(jì)劃成功地降低了火車的汙染狀況。 返回 retrofit