1.prominent deep crater on the Moon with a distinctive central peak, located at the southern edge of Mare Imbrium, 58 km (36 mi) in diameter
1.Eratosthenes calculated the distance to the sun in 200BC, having already deduced the circumference of the Earth.
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。
2.Eratosthenes result agrees quite nicely with the actual value.
Eratosthenes的结果与实际值是相当接近的。
3.This is same Eratosthenes who invented the "sieve" for determining whether a number is prime or not.
Eratosthenes还发明了确定一个数是否是质数的“筛子”。
4.The Greek mathematician, Eratosthenes, had accurately deduced that the world was approximately 25, 000 miles in diameter.
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。