看板 Math 關於我們 聯絡資訊
I posted my problem in the following website: http://www.physicsforums.com/showthread.php?p=3295108#post3295108 Does any one know how to calculate it? Thanks in advance! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 134.208.24.25