A series of new concepts are introduced such as plural distance , visual length, physical length, plural angle, visual angle, physical angle, dual-diagram and so on.Application of Geometry in Plural Space in physics are systematically described.%引入复距、视长、实长、复角、视角、实角、对偶图象等一系列新概念,系统阐述复空间中的几何学在物理中的应用。
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