名词
中文翻译：Unknown
同义词：
['astrophysics', 'planetology', 'planetary physics']
例句：
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1. The study of the motion of planets is known as planetology.
研究行星运动的学科被称为行星学。
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2. This theory of planetary motion was first proposed by Sir Isaac Newton.
牛顿首次提出了行星运动的理论。
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3. The discovery of a new planet has sparked a new wave of interest in the field of planetology.
发现一个新行星引发了对行星学领域的新一轮兴趣。