Last Updated：2025/11/21
Sentence
18世紀の実験で、化学者たちは水の上に水素を集め、それが燃えるのを観察した。
Quizzes for review
During the 18th-century experiments, chemists collected inflammable air over water and watched it ignite.
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During the 18th-century experiments, chemists collected inflammable air over water and watched it ignite.
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