这个谜流传了很长的时间，以至于它已经成为那些无法回答的问题的代名词。实际上，我们只需要对一些生物问题稍加分析就能解开这个谜。人们普遍认为，在现代鸟类进化史的某一时刻，两只不太像鸡的动物进行了交配，然后产下了一个蛋，最后这个蛋便进化成了鸡。出现这个变化到底 The mystery spread so long that it has become synonymous with unanswerable questions. In fact, we only need to analyze a few biological problems to solve this mystery. It is generally believed that at some point in the evolutionary history of modern birds, two animals that are not as chickens are mated, and then one egg is laid down, and finally the egg evolves into a chicken. This change has occurred in the end