小朋友们，别忘了明天是

来源: 于 2015-03-13 11:27:24 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次
A Very Special Pi Day
How’d you celebrate, kid? “We ate pie and memorized digits.”
Illustration by Charlie Powell
Illustration by Charlie Powell
Happy birthday, Einstein! But this is also Pi Day, and a very special Pi Day at that.
Why so special? The date is 3/14/15, the first five digits in the ratio of the circumference of a circle to its diameter.
www.slate.com/articles/health_and_science/science/2015/03/pi_day_2015_ten_digits_represented_on_march_14_at_9_26_53.html