名词
中文翻译：天文学家
同义词：
['astrologer', 'astronomer例句：1. The Almagest is a book that explains the principles of astronomy.（《阿尔马加斯》是一本解释天文学原理的书。）']
例句：
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1. The Almagest is a book that explains the principles of astronomy.
《阿尔马加斯》是一本解释天文学原理的书。
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2.He was an expert in the field of astronomy and had made many discoveries.
他在天文学领域是一位专家，并取得了许多发现。
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3. The Almagest was written by Hipparchus around 250 BC and is considered one of the earliest works on astronomy.
《阿尔马加斯》由希帕克斯在公元前250年左右编写，被认为是最早的天文学著作之一。