dualistn.二元论者
dualadj.双重的;成双的n.双数
dual-focus spot双焦点光斑
dualistic pattern双重型态
dual-axle motor双轴电机
dual polarization双极化
Dual-redundancy双余度
dual-purpose bus客货两用车
Dual-light beams双光束
dual arches tunnel双跨连拱隧道
dual realationship对偶关系
Dual - frequency双频