为什么鸡蛋会变坏？这个问题困扰着许多人。毕竟，鸡蛋是我们日常饮食中非常重要的食材之一。鸡蛋的新鲜程度直接影响着我们的健康和食品安全。所以，了解鸡蛋变坏的原因是至关重要的。

首先，鸡蛋变坏的主要原因是因为细菌感染。鸡蛋的外壳表面可能携带有细菌，如沙门氏菌、大肠杆菌等。如果这些细菌进入到鸡蛋内部，它们会开始繁殖，并分解鸡蛋的组织结构。这就导致鸡蛋变得恶臭并产生有害物质。所以，正确储存和处理鸡蛋是非常重要的，以防止细菌感染。

Secondly, another factor that contributes to egg spoilage is exposure to air. The shell of an egg is semipermeable, which means it allows air to slowly penetrate through the pores. As time goes by, the air inside the egg expands and causes the egg to deteriorate. This is why eggs should be stored in a cool and dry place, preferably in a refrigerator, to prolong their freshness.

其次，导致鸡蛋变坏的另一个因素是暴露在空气中。鸡蛋的外壳是半透性的，即它可以通过毛孔缓慢地透气。随着时间的推移，蛋内的空气膨胀，导致蛋的状况恶化。这就是为什么鸡蛋应该储存在一个凉爽干燥的地方，最好是在冰箱里，以延长它们的新鲜度。

Lastly, temperature also plays a crucial role in egg spoilage. Eggs are highly perishable and are susceptible to bacterial growth at warm temperatures. When eggs are stored in a warm environment, the bacteria present on the shell can multiply rapidly and cause the eggs to spoil quickly. Therefore, it is essential to store eggs at or below 4°C (40°F) to inhibit bacterial growth and extend their shelf life.

最后，温度也在鸡蛋变质中起着至关重要的作用。鸡蛋非常易腐，容易在高温下滋生细菌。当鸡蛋存放在温暖的环境中时，外壳上的细菌会迅速繁殖，导致鸡蛋迅速变质。因此，将鸡蛋储存在4°C（40°F）以下或者冷藏库中，对抑制细菌生长和延长保质期至关重要。

In addition to the above factors, the age of an egg also plays a role in its spoilage. As eggs age, their protective coating called the cuticle gradually wears away, making them more susceptible to bacterial contamination. Therefore, it is advisable to consume eggs within a reasonable period after purchase and always check the expiration date before consuming.

除了以上因素外，鸡蛋的年龄也会影响其变质。随着鸡蛋的老化，它们的保护膜叫做卵壳表面膜逐渐磨损，使其更容易受到细菌污染。因此，建议在购买后合理内的时间内食用鸡蛋，并始终在食用前检查过期日期。

In conclusion, the spoilage of eggs is mainly caused by bacterial infection, exposure to air, warm temperatures, and the age of the egg. To ensure the freshness and safety of eggs, it is essential to handle and store them properly. By following proper storage practices and consuming eggs within a reasonable period, we can minimize the risk of consuming spoiled eggs and protect our health.

简而言之，鸡蛋变坏主要是由于细菌感染、暴露在空气中、高温以及鸡蛋的老化。为了确保鸡蛋的新鲜和安全，正确储存和处理鸡蛋非常重要。通过遵循适当的储存方法和在合理的时间内食用鸡蛋，我们可以将食用变质鸡蛋的风险最小化，保护我们的健康。