Duality

[djuː'ælɪtɪ] or [du'æləti]

解释:

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

(noun.) (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.

录入:梅林达--From WordNet

解释:

(n.) The quality or condition of being two or twofold; dual character or usage.

卡蜜拉整理