[mass noun]the quality or condition of being dual 两重性 this duality of purpose was discernible in the appointments. 这一目的的两重性可从任命中看出。 ■(Mathematics)the property of two theorems, expressions, etc. being dual to each other (数)对偶性 ■(Physics)the quantum-mechanical property of being regardable as both a wave and a particle (物理)二像性;对偶性
an instance of opposition or contrast between two concepts or two aspects of something; a dualism 对立性,二元性 the simple dualities of his youthful Marxism: capitalism against socialism, bourgeois against prole. 他不成熟的马克思主义的简单对立: 资本主义与社会主义相对立,资产阶级与无产阶级相对立。
语源
late Middle English: from late Latin dualitas, from dualis (see dual)