小 引本文主要引据《史记》的历书和前后《汉书》的历志，试图用现今较易明白的表述方式，对中国古代天文学的基本知识和制订历法的基本原理有所阐明，谈不上什么研究，主要是自己学习，写出来成文，或者可以省读者的翻检寻绎之劳。读史者每谓历志难读。然而须知，其难并不在于 The main quotation of “Xiajiu” mainly refers to the historical records of “Historical Records” and the history of “Han Dynasty” before and after, trying to clarify the basic knowledge of ancient Chinese astronomy and formulating the basic principles of the calendar by using the present easy-to-understand expressions On what kind of research, mainly their own learning, written or written, or you can save the reader’s seizure. Reading history each is hard to read diary. However, notice, the difficulty is not that