In terms of the astronomical calendar, October in China is beautiful autumn;

从天文纪年的角度来说，10月在中国是美丽的秋天；

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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.

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。

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Certainly, I am interested in astronomical and calendar function.

当然，我对天文和历法的功能很感兴趣。

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Until now it had been thought that Stonehenge was built as an astronomical calendar or observatory.

BBC: Stonehenge builders travelled from far, say researchers

Others think they mark out an astronomical clock or celestial calendar.

BBC: The perfect trip: Brittany and Normandy