dualinn.炸药的一种dualadj.双重的；成双的n.双数dual list display双重列表显示dual-core model双核心模式dual media filter双层滤池dual feed knitter双系统针织机,双吃线织袜机dual-head meter双头流量计dual organization双元组织Dual-Luciferase双荧光素酶dual sector model两部门模型Dual drive system双驱动系统dualistic utility二维效用