bùliào, shéngzi, chuānglián zhè lèi àn chángdù mài de dōngxi, cái kāi yǐhòu tōngcháng bù hǎo tuì

布料、绳子、窗帘这类按长度卖的东西，裁开以后通常不好退。

Items sold by length, such as fabric, rope, and curtains, are usually hard to return once they are cut.