单词	point symmetry
释义	point symmetryˈpoint ˌsymmetry noun [uncountable] math, geometry the quality of an object or figure that can be turned 180 degrees around a point and still look the same. In other words, it looks the same upside down and right side up. → reflectional symmetry
随便看	random variable rang range rangefinder ranger Rangoon rank rank-and-file rank and file ranking Rankin, Jeannette rankle rankly rankness ransack ransom rant rap rapacious rapaciously rapaciousness rapacity Rapa Nui rap artist rape

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