還有一個是圓圈著搓有一個"上勁兒"的原因.這個得去問物理學大師了.

來源: 笑比哭好於 2011-05-10 10:11:01 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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