在沒拿起任何一個信封前

來源: teetrinker 於 2010-06-11 06:01:08 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

拿到錢的期望值是無窮大，拿哪個信封都一樣
拿起一個信封後，信封裏的錢數總是少於無窮大，所以必須換

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.