有些人为了食用方便 ,一次购买数斤猪肉放入冰箱冷藏 ,用时就拿出来切一点。这样的做法不科学。猪肉的营养成分有水分、蛋白质、脂肪、灰分、钙、磷、铁、硫胺素、核黄素等 ,解冻后大量营养物质随液体流失 ,结果使重量减轻 ,肌肉变形。如果二次冷藏解冻后将同样损失大量营养成 Some people in order to facilitate food, buy a few pounds of pork into the refrigerator, when used to cut out a little bit. This is unscientific. Nutrients of pork have moisture, protein, fat, ash, calcium, phosphorus, iron, thiamine, riboflavin, etc., after thawing with a large number of nutrients loss of liquid, resulting in weight loss, muscle deformation. If the secondary freeze thaw will also lose a lot of nutrition into