在北京的西南郊离城大约50公里的地方,有一个名叫周口店的小镇。它的西边有一座由石灰岩构成的圆形小山,叫作龙骨山,在这里发现了四五十万年以前原始人类的遗骨和使用的工具、用火的遗迹,以及大批的哺乳动物化石。这里就是世界著名的北京猿人遗址,它是世界上同年代人类遗址中代表性最全面、发现材料最 In the southwest suburbs of Beijing about 50 kilometers away from the city, there is a small town named Zhoukoudian. To the west of it lies a circular hill of limestone, called the Dragonbok, where the remnants of primitive humans and the tools used, the remains of fire, and large mammal fossils were discovered four to five hundred thousand years ago. Here is the world famous Peking Man Site, which is representative of the most comprehensive human sites in the world in the same period, the discovery of the most material