什么是物理变化

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2723122,836218,1959348,1107735,1092303,860473,592570,509824,705563,1087595,1115408,594594,971317,1090036,864252,1175273,1093851,2782536,1106158,1096218,3060426,610472,2065854,449715,516640,1100262,1105237,1108708,2033299,1097945) ORDER BY field (ArticleID,2723122,836218,1959348,1107735,1092303,860473,592570,509824,705563,1087595,1115408,594594,971317,1090036,864252,1175273,1093851,2782536,1106158,1096218,3060426,610472,2065854,449715,516640,1100262,1105237,1108708,2033299,1097945)