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pi

pi /ˈpaɪ/ noun
pi
/ˈpaɪ/
noun
Learner's definition of PI
[noncount] geometry
: the number that results when the circumference of a circle is divided by its diameter and that is approximately 3.1416
also : the symbol π used for this number圆周率(用π表示)

PI

PI abbreviation
PI
abbreviation
Learner's definition of PI
private investigator私家侦探

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