科研之友
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摘要
<正>"鸡"与"蛋"孰先孰后的问题,是个千古之谜,长期争论不休。例如:1.We’ve heard the classic expression,"which came first,the chicken or the egg?"Chickens hatch from the eggs,but eggs are laid by the chickens,arousing endless debates for centuries.我们都听说过"鸡和蛋,先有谁?"这个经典的表述。鸡是从蛋孵化的,而蛋又是鸡下的,从而引起几个世纪无休止的辩论。有人根据进化生物学,主张先有蛋,后有鸡。例如:2.According to evolutionary biology,the egg came first as it evolved prior
