Command Duty Officer指挥值勤官 Collateralized Debt Obligation债务抵押债券 Coaxial Digital Output同轴数字输出 Collaboration Data Objects协作数据对象 common duct obstruction胆总管梗阻 Central Dense Overcast中心密集云层区 Chief Design Officer首席设计官 Chief Download Officer首席下载官，下载总监 chief destruction officer首席破坏责任人 Chief Development Officer开发总监 chief diplomatism officer首席外交官 Chief District Officer主要地区官员 Care Delivery Organization医疗机构 Chromosome Deletion Outreach, Inc删除外展公司染色体 Care Delivery Organization (healthcare)保健机构(保健)