祖冲之是中国古代最伟大的数学家之一。
Zu Chongzhi was one of the greatest mathematicians in ancient China.
祖冲之在数学方面的成就为世界所公认。
Thee achievements Zu Chongzhi made in mathematics have been universally acknowledged.
直到1，000多年以后，西方的数学家才达到和超过了祖冲之的成就。
Not until more than 1,000 years later, did scientists in the West come up to and surpass the achievements of Zu Chongzhi.
直到1，000多年以后，西方的数学家才达到和超过了祖冲之的成就。
Not until more than 1,000 years later, did scientists in the West come up to and surpass the achievements of Zu Chongzhi.
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