DDDabbr.交货截止日期(=Desired Delivery Date)DDabbr.国防部（=department of defense）abbr.到期日期（=due date）abbr.即期汇票（=demand draft）Ddouble-balloon enteroscopy双气囊小肠镜DDNS Dynamic Domain Name System动态域名系统DD downwind source of pollution顺风污染源DDS of compound Chinese medicine中药复方释药系统DDL drawing description language工程图样描述语言DDLDDSS Dolby Digital Surround Sound杜比数字环绕声DDU directional Doppler ultrasound方向性多普勒超声DDM has been absorbed completely.14周后,DDM已基本吸收形成骨。DDC -- Destination Delivery Charge目的地卸货费DDI?Direct?dialing?in?直接拨入?