Duola朵拉duon.成对的表演者；二重奏（唱）pref.表示“二”；“一对”duodenal open of stomach幽门口Duo flow high speed mixer双流高速搅拌机Duodenal injury diagnosis十二指肠损伤Duodenal-biliary reflux肠胆反流duo-directional current双向电流duo-prism monochromator双棱镜单色仪duopoly under uncertainty不确定性下的双头垄断duodenocecal transit time小肠通过时间Duodeual fluid examination十二指肠液检查duoble cone-type blender双锥式混合机

1. The first is that the dollar's global monopoly will give way to a duopoly of the dollar and the euro.
   第一种情况是美元的全球垄断地位