deceln.减速计Decn.十二月n.美国数字电子公司deca-brominated diphenyl ether十溴联苯醚decussatio lemniscorum medialium丘系交叉decamethylene diammonium adipate己二酸癸二胺盐decreasing consumption of oxygen降低氧消耗decislon-maklng support system决策支持系统decreasing of standard deviation标准差降低declarative knowledge definition陈述知识定义decreasing seismic effectiveness减震效果decylammonium tetrachlorozincate四氯合锌酸十二烷基铵decussationes of medial lemnisci丘系交叉