double bud重芽doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-zero rapeseed双零油菜double-decker bridge双层桥double disc gate valve双圆板闸阀double ended magnetron两端出线磁控管double ended autoclave双门热压釜double-tariff system双税系统double-filament bulb双丝灯泡double renewal process布朗运动double-end snap gage双头卡规double-webbed girder双腹板桁梁