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牛奶过期后味道会变酸,乳酸含量增加。而乳酸是一种天然的去污剂,可以用来清理木地板。此外,牛奶中所含的蛋白质和脂肪等物质,可以
After the taste of milk will become sour, lactic acid content increased. Lactic acid is a natural detergent that can be used to clean wooden floors. In addition, milk contains substances such as protein and fat, you can