難怪出不來。
哦,原始推導居然用了曲麵積分。
所有跟帖:
• 不是曲麵積分。是積分求旋轉麵. -jinjing- ♀ (203 bytes) () 08/15/2011 postreply 16:26:28
• 不是曲麵積分。是積分求旋轉麵. -jinjing- ♀ (203 bytes) () 08/15/2011 postreply 16:26:28
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