Moments, centre of mass

Mabel

2010-06-06 5:33 am

http://i409.photobucket.com/albums/pp172/momoko_deedee/Mo_M.jpg

回答 (1)

用戶9112

2010-06-06 6:59 pm

✔ 最佳答案

Please see the following:

圖片參考：http://img526.imageshack.us/img526/2903/58752898.png


2010-06-06 10:59:50 補充：
http://img526.imageshack.us/img526/2903/58752898.png

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