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Back in the 17th century French astronomer Jean Picard made his mark by measuring the sun's diameter.
回到17世纪，法国天文学家Jean Picard成功地测量了太阳的直径。
youdao
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Back in the 17th century French astronomer Jean Picard made his mark by measuring the sun's diameter.
回到17世纪，法国天文学家Jean Picard成功地测量了太阳的直径。
youdao