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並前往https://obamawhitehouse.archives.gov/blog/2015/03/13/pi-day-2015-day-so-fun-it-s-irrational

Pi Day 2015: A Day So Fun, it's Irrational! | whitehouse.gov

Summary: The importance of math education and numeracy skills to all Americans cannot be overstated and so, we at the White House couldn't ...

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