有人說過會等待,卻一聲不吭的離開
68–95–99.7 rule - Wikipedia, the free encyclopedia 有人說過會等待,卻一聲不吭的離開。有人沒有給返回承諾,但.. ...太過美好的東西從來都不適合經歷,因為一旦經歷便無法遺忘——題記在無數個睡不著的晚上,我相信會有很多人,習慣性的開始閉上眼睛,安靜的想念一個人,想念一張臉。而在他們心裡,能夠有這樣一個人可以想念,或許就夠了。In statistics, the 68–95–99.7 rule, also known as the three-sigma rule or empirical rule, states that nearly all values lie within three standard deviations of the mean in a normal distribution. About 68.27% of the ......
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