deceln.减速计Decn.十二月n.美国数字电子公司decussation of trochlear nerve滑车神经交叉dectrical controlling circuits电气控制线路decessit sine prole superstite[法] 死后无活着的子女Decca Area Navigation Computer台卡区域导航计算机decussatio bracbii conjunctivi小脑上脚交叉decrescendo-crescendo murmur渐弱-渐强性杂音Decca navigator decometer unit台卡导航仪指示器单元Decca Long Range Area Coverage"台卡"远程导航系统覆盖面积decalcified allogenetic dentin脱钙牙本质declining balance depreciation余额递减折旧