conversion pig炼钢生铁conversionn.转变；换算Conversion In Lieu of Procurement用改装代替采购conversion of cropland to forests退耕还林conversion between dual languages双语言转换conversion of farmland to forests退耕还林conversion of branch trial balance分支机构试算表折算conversion of electrical endurance电寿命折算conversion from farmland to forest退耕宜林地conversion with the co-efficient按折价率换算conversion ratio of reducing sugar还原糖转化率conversion of farmland to forestry退耕还林