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The period of Erlitou Culture is the time of the Chinese courtesy formation.
二里头文化时期也是中国礼制体系形成时期。
youdao
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In the late period of basin formation volcanism is weak.
盆地形成后期火山作用微弱。
youdao
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In the late period of basin formation volcanism is weak.
盆地形成后期火山作用微弱。
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