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- 公元前200年，埃拉托色尼在计算地球到太阳的距离时，已经推算出地球的周长。
Eratosthenes calculated the distance to the sun in 200BC, having already deduced the circumference of the Earth. - 希腊数学家埃拉托色尼，曾准确地推断地球直径约为25000公里。
The Greek mathematician, Eratosthenes, had accurately deduced that the world was approximately 25, 000 miles in diameter. - 也就是在那里，在哥白尼学说出现的1800年之前，阿里斯塔克确立了以太阳为中心的太阳系的假说，埃拉托色尼计算出了地球的周长。
It was there, 18 centuries before the Copernican revolution, that Aristarchus posited a heliocentric solar system and Eratosthenes calculated the circumference of the Earth.
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