不矛盾，为求精确借助几何求证而已，尤其在表现阴影和投影方面。

来源: 拉兄弟一把于 2011-12-22 20:35:43 [旧帖] [给我悄悄话] 本文已被阅读：次

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