Dilatation and Evacuation扩张和排空,扩张宫颈和清宫术 Deposit and Exit (conveyor or canal)存款和出口(或管式) Demonstration & Evaluation示范和评价 Davis & Elkins College戴维斯和Elkins学院 Developing & Emerging (markets)市场开发和新兴 Demonstration and Exercise示范和锻炼 Discharge and Exit排放并退出