ROIabbr.投资收益率；利润率(=return on investment)ROabbr.雷达操作人员(=Radar Operator）abbr.雷达测距器(=Range Roly)Rozasn.罗扎斯Rouha劳哈Roisi罗伊西roize填零,补零Roxeyn.罗克西Rovac罗娃克牌手表Roine罗伊内ROFOR=Route Forecast[航空]航线预报Rorai罗拉伊Rouja鲁雅