研究合著者、科尔盖特大学天文学兼人类学教授安东尼·艾凡尼表示，在2012年结束的只是其中一个历法周期。
All that ended in 2012 was one of its calendar cycles, said co-author Anthony Aveni, professor of astronomy and anthropology at Colgate University.
证据很明显，某些拥有天文学先进知识的人访问过这个行星的人们，留来了历法作为标记。
The evidence is clear. Someone with advanced knowledge of astronomy has visited peoples of this planet and left calendars as a signature note.
然而该书提供的天文历法在当时是最先进的，历史证实刘焯研究天文学已有相当高的水平。
However, the book provides the astronomical calendar was the most advanced in the study of the history of astronomy confirmed Zhuo has a fairly high level.
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