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ex·ten·si·ty AHD[ĭk-stĕnʹsĭ-tē] D.J.[ɪkˈstensɪtiː]K.K.[ɪkˈstɛnsɪti]n.（名词）pl. ex.ten.si.ties 【复数】- The quality of having extension or being extensive.扩张性，延展性：有延长的性质或延长的性质
- A specific degree or range of extension.扩展界限：扩展的具体程度或界限
- The attribute of sensation that enables one to perceive space or size.扩展感觉性：使人能觉察到的空间或大小的感觉的性质
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