Last Updated：2025/12/04
Sentence
17世紀の天文学者は、望遠鏡で観測した黒点を綿密に記録した。
Quizzes for review
The 17th-century astronomer meticulously recorded the solar maculation he observed through his telescope.
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The 17th-century astronomer meticulously recorded the solar maculation he observed through his telescope.
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