减弱不好
发表于 2025-3-23 11:10:03
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拥护者
发表于 2025-3-23 17:31:50
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碎片
发表于 2025-3-23 18:37:26
Heidelberger Jahrbücherhttp://image.papertrans.cn/h/image/425309.jpg
裂口
发表于 2025-3-24 02:13:52
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幻影
发表于 2025-3-24 03:00:58
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Relinquish
发表于 2025-3-24 07:18:01
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BACLE
发表于 2025-3-24 12:29:38
The measurement of time was one of the first applications of astronomy and many of observational astronomy’s underpinnings are related to time. Knowing the Julian date and local sidereal time are key in identifying what objects can be observed and when.
BOAST
发表于 2025-3-24 17:42:23
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完成才会征服
发表于 2025-3-24 22:55:50
Hermann HoepkeThis book is merely an introduction to a vast subject. There is a great deal of additional knowledge concerning these topics, and there are a number of excellent books and expository papers treating much of that material. We briefly describe some of these expositions in order to make it easier for the reader to pursue further study.
ureter
发表于 2025-3-25 02:25:19
This book is merely an introduction to a vast subject. There is a great deal of additional knowledge concerning these topics, and there are a number of excellent books and expository papers treating much of that material. We briefly describe some of these expositions in order to make it easier for the reader to pursue further study.