duality

汉语翻译：
n. 二元性
【化】 二象性; 双偶性
【经】 二重性英语解释：
名词 duality:

being twofold; a classification into two opposed parts or subclasses同义词：dichotomy

(physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory同义词：wave-particle duality

(geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry

详细解释：
du.al.i.ty
n.（名词）
The quality or character of being twofold; dichotomy.
两重性：具有两方面的性质或特点；一分为二