检查食品保质期的有效方法

检查食品保质期的有效方法

Food spoilage is mainly the result of a mutual interaction between two factors, the nature of the food itself and the external environment.

食品变质主要是食品本身的性质和外部环境这两个因素相互作用的结果。

If you keep the following rules in mind, you can tell a food is fresh or old just by looking at the food .

如果你能记住下面这些规则，你就能通过看食物来判断食物是新鲜的还是旧的。

1. Leftovers in the refrigerator

冰箱里的剩菜

Many people have a habit of storing leftovers in the refrigerator for the day together and eating them the next day. However, this is not the best way to preserve food because not all foods are resistant to the growth of bacteria and mold when stored in the refrigerator.

很多人都有把剩菜放在冰箱里，第二天一起吃的习惯。然而，这并不是保存食物的最好方法，因为并不是所有的食物都能抵抗细菌和霉菌的生长。

If the refrigerator does not have enough cold temperature, it will not be able to store food for more than 1 day, or the refrigerator contains too much food, resulting in lower quality.

如果冰箱没有足够的低温，食物就不能储存超过1天，或者冰箱里食物太多，导致质量下降。

When you notice that food has an unusual smell, stale vegetables, and raw meat thawed is viscous and has an unusual odor, it is a sign that the food has been rancid and should not be used.

当你注意到食物有一种不寻常的气味，陈腐的蔬菜，和生肉解冻后粘稠并有一种不寻常的气味，这是一个信号，表明食物已经变质了，不应该使用。

2. Eggs

鸡蛋

Eggs can be stored in the refrigerator for 3 weeks. But if you are wondering whether the home egg is old or new, get a full glass of water or a bowl of water and put the egg in there.

鸡蛋可以在冰箱中保存3周。但是如果你想知道家里的鸡蛋是新的还是旧的，那就拿一杯水或者一碗水，把鸡蛋放进去。

If the egg sinks to the bottom, it is still fine to use but if the egg floats, the eggs are spoiled and out of date.

如果鸡蛋沉到底部，仍然可以使用，但如果鸡蛋浮起来，鸡蛋就变质了，过期了。

3. Yogurt

酸奶

When unopened, yogurt can be stored for 1 week in the refrigerator and 5 days if opened, and you should pay attention to the expiry date shown on the packaging.

酸奶未开封时可在冰箱中保存1周，开封后可保存5天，请注意包装上的过期日期。

If you open the yogurt and notice signs of mold or color changes, immediately throw it in the trash.

如果你打开酸奶发现有霉菌或颜色变化的迹象，立即把它扔进垃圾桶。

4. Red meat

红肉

The shelf life for red meat is about 1-3 days if it's raw and 7-10 days if it's cooked. For meat purchased in the supermarket, throw it out immediately if the expired meat is printed on the package to avoid food poisoning.

红肉的保质期是1-3天，如果是生的，是7-10天。在超市购买的肉类，如包装上印有过期肉类字样，应立即扔掉，以免食物中毒。

Red meats show signs of spoilage often have a distinct, pungent odor and a bad smell.

有腐败迹象的红肉通常有一种明显的，刺鼻的和不好的气味。

5. Poultry meat

禽肉

Fresh poultry, light pink in color, and cooked poultry should be white. When the color of the meat turns gray and has a strong odor it is likely that the food is spoiled and cannot be used anymore.

新鲜家禽肉呈淡粉红色，煮熟的家禽肉应是白色的。当肉的颜色变成灰色，并有强烈的气味，这可能是食物变质，不能再使用。

6. Watermelon

西瓜

On the outside, watermelons may differ depending on the variety, but on the inside, melons should always be pink or magenta.

西瓜的外观可能因品种不同而有所不同，但在内部，西瓜应该始终是粉红色或洋红色。

If the melon is removed and the red part is darker than usual, and the sweetness is not natural, the melon is likely to be booted. The melon has a pale white streak and slightly viscous, then the melon will rot. New, delicious melons will always be fragrant, fresh and very sweet, with hard melon rind and without pitting holes.

如果去掉瓜瓤，红色部分比平时深，甜度不自然，瓜瓤就有可能坏掉了。甜瓜呈淡白色条纹，略显粘稠，就会腐烂。新鲜可口的瓜总是香气扑鼻，鲜甜可口，瓜皮坚硬，没有麻子洞。

7. Fresh milk

新鲜牛奶

For unopened box of milk, you can still use it within 1 week from the expiration date indicated on the carton. This applies only to 1%, 2% and skim milk.

对于未开封的牛奶盒，从保质期开始算起，一周内仍可使用。这只适用于1%，2%和脱脂牛奶。

With fresh milk, depending on the type of milk, you must use it in 24 hours or 2-3 days, store them in the refrigerator at a temperature of about 4.4 degrees Celsius. Don't keep boxes of milk on the refrigerator door because it has an unstable temperature, not suitable for milk storage.

对于鲜奶，根据牛奶的类型，你必须在24小时或2-3天内使用它，将它们储存在温度约4.4摄氏度的冰箱中。不要把盒装牛奶放在冰箱门上，因为冰箱门温度不稳定，不适合存放牛奶。

The rotten milk will be slightly viscous and has a sour taste that is no longer as fragrant as fresh milk.

腐坏的牛奶会有轻微的粘稠和酸味，不再像新鲜牛奶那样芳香。