deceln.减速计Decn.十二月n.美国数字电子公司declartaion concerning pedigree[法] 关于家系声明decussation of medial lemniscus(内侧)丘系交叉decreasing rate of product cost产品成本降低率declining of ground water level水位下降Declining an offer of something谢绝提供的东西decimeter wave therapy apparatus分米波治疗机decidua placentalis subchorialis[医] 绒[毛]膜下蜕膜dechlorination in agueous system水相脱氯decreasing time delay controller滞后时间削弱器deceleration- based controller减速度控制