Difference of Two Squares (mathematics)不同的两个正方形(数学) Directly Observed Treatment ShortcourseShortcourse直接观察治疗 Directory Order Transmission System目录秩序的传输系统 Dynamic On Time Solutions动态时间的解决方案 Dredging Operations Technical Services挖泥作业的技术服务 Database of Transcribed Sequences数据库的转录序列 Document Tracking System文档追踪系统 Directly Observed Treatment/Therapy Short Course直接观察治疗或治疗疗程短 Director Of Training and Simulations导演的训练和模拟 Direct Observation Treatment Short直接观察治疗短 Deformities Open wounds Tenderness Swelling畸形开放性创口压痛肿胀 Dynamic Ocean Tracking System动态海洋跟踪系统 Department of Trade Statistics贸易统计 Day of the Sword (band)一天的刀剑(带) Dozens of Terrific Stamps数十名了不起的邮票