曾經有讀者写信詢問鸡蛋是否能够直立,如果能够直立,那么又是什么道理。鸡蛋在光滑的平面上,大头或小头朝下都可以直立,不过大头朝下更容易些。人人都可以通过实驗来证明,只要你足够細心。直立的时候如果受到輕微外力,鸡蛋还会微微摆动而不倒下。鸡蛋为什么可以直立呢?人們所以会发生这个疑問,是因为鸡蛋是一个一头大、一头小的特殊橢球。如果鸡蛋是 Once a reader wrote to ask if the egg can stand upright. If it can stand upright, then what is the reason. The eggs are on a smooth surface, with the large head or small head pointing upright, but the bulk heading down is easier. Everyone can prove through experiments, as long as you are careful enough. If you are exposed to slight external force when standing upright, the egg will swing slightly without falling down. Why can eggs stand upright? This question arises because the egg is a large, small, special ellipsoid. If the egg is