Last Updated：2025/11/22
Sentence
19世紀の天文台では、計算を行う人が天文表を手作業で確認するのに長時間を費やしていた。
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In the 19th-century observatory, the computant spent long hours verifying astronomical tables by hand.
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In the 19th-century observatory, the computant spent long hours verifying astronomical tables by hand.
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