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pi
p paɪ paɪ
NUM 圆周率(通常用希腊字母表示,近似值为3.142 Pi is a number, approximately 3.142, which is equal to the distance round a circle divided by its width. It is usually represented by the Greek letter �. 圆周率(通常用希腊字母表示,近似值为3.142
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