Eratosthenes

常見例句

• This is same Eratosthenes who invented the "sieve" for determining whether a number is prime or not.
  Eratosthenes還發(fā)明了確定一個(gè)數(shù)是否是質(zhì)數(shù)的“篩子”。
• The best of the early measurements of the earth's circumference was made by Eratosthenes.
  早期測量地球周長的最準(zhǔn)確結(jié)果是由埃拉托斯特尼得出的。
• Eratosthenes sieve method is a method to search for all prime numbers less than natural number N(N>1).
  埃拉托斯特尼篩法是求不超過自然數(shù)N(N>1)的所有質(zhì)數(shù)的一種方法。
• Eratosthenes knew that the distance between Alexandria and Syene was approximately 800 kilometers, because he hired a man to pace it out.
  Eratosthenes知道Alexandria和Syene之間的距離約略是800公里，因?yàn)樗陀萌擞媚_一步一步地走而算出來的。
• Eratosthenes had the presence of mind to do an experiment, actually to observe whether in Alexandria vertical sticks cast shadows near noon on June21.
  Eratosthenes立刻打定主意，并且馬上就進(jìn)行實(shí)驗(yàn)：觀察垂直的棍棒在6月21日中午的Alexandria城是否會(huì)現(xiàn)出影子。
• Eratosthenes asked himself how, at the same moment, a stick in Syene could cast no shadow and stick in Alexandria, far to the north, could cast a pronounced shadow.
  Eratosthenes心中不禁疑問著：同樣都是夏至的時(shí)刻，在Syene城，棍棒完全不顯出陰影，而在Syene北方的Alexandria城，卻投射出非常顯著的影子。
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