Dualeh杜阿莱dualadj.双重的；成双的n.双数dual inequality对偶不等式dual-port RAM双口RAMdual economical二元经济dual constraint[计] 对偶约束dual-spectrum双光谱dual bit stream双比特流dual wavelength双波长Dual processors双处理器dual comparator双比较电路dual governance城乡二元治理