Last Updated：2025/12/02
Sentence
天文学者たちは金星と水星の会合周期を比較して、それらの見え方のパターンを理解しようとした。
Quizzes for review
Astronomers compared the synodic periods of Venus and Mercury to understand their visibility patterns.
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Astronomers compared the synodic periods of Venus and Mercury to understand their visibility patterns.
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