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並前往https://www.cbc.ca/kidscbc2/the-feed/march-14-or-3-14-is-known-as-pi-day

March 14 — or 3/14 — is known as Pi Day! - CBC

March 14 — or 3/14 — is known as Pi Day! Happy Pi Day! No, not pie day (although that would be delicious). Today is pi day — a special math day to celebrate ...

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