我们不需要你们空谈玉文化、玉礼制、玉历史，我们需要的是实实在在的全面的鉴玉知识。
We do not need you talk jade culture, jade ritual jade history, we need is real and comprehensive knowledge of Kam-yu.
二里头文化时期也是中国礼制体系形成时期。
The period of Erlitou Culture is the time of the Chinese courtesy formation.
另一方面，它不仅具有纪念功能、实用功能，同时也表现出了严格的社会等级制度，是儒家礼制文化的一个表征符号。
On the other hand, not only has the practical function of the door, mark the features, but also showed a strict rating system and become a culture of Confucian ceremony symbolic representation.
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