Last Updated：2025/11/25
Sentence
天文学者たちは、多くの渦巻銀河の中心に超大質量ブラックホールが存在することを発見した。
Quizzes for review
Astronomers discovered that many spiral galaxies contain supermassive black holes at their centers.
See correct answer
Astronomers discovered that many spiral galaxies contain supermassive black holes at their centers.
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