fuel additive短语¹³¹⁶²⁰⁺³ 基本例句 燃料添加剂 The effects of methylcyclopentadienyl manganese tricarbonyl MMT fuel additive on emission and emission control system of vehicles have ever been the focus of dispute. 甲基环戊二烯三羰基锰 MMT对机动车排放及排放控制系统的影响一直是人们争论的焦点。 dictall