The imperial porcelain culture is one of the shiny pages of the Chinese civilization history, and the culture and arts agglomerated in Song porcelains are unprecedented and unrepeatable.
宋代官窑瓷文化在中国文明史上有着辉煌的一页，凝聚在宋瓷上的文化艺术更是空前绝后的。
The level of preparation and efficiency evident in the Beijing Games is unprecedented and very possibly unrepeatable.
北京奥运会这种水平的准备工作及其效率是空前的，并且很有可能是绝后的。
The level of preparation and efficiency evident in the Beijing Games is unprecedented and very possibly unrepeatable.
北京奥运会这种水平的准备工作及其效率是空前的，并且很有可能是绝后的。
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