◎ 祖率 zǔlǜ [the approximate ratio of the circumference of a circle to its diameter as calculated by Zu Chong Zhi][数]∶南北朝时祖冲之算出圆周率的近似值在3.1415926和3.1415927之间,并指出圆周率的约率为22/7,密率为355/113。为了纪念祖冲之,把他算出的近似值叫做祖率
英文翻译
1.{数} the approximate ratio of the circumference of a circle to its diameter as calculated by Zu Chongzhi (祖冲之 A.D. 429-500), i.e. between 3.1415926 and 3.1415927
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