久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

您現在的位置: > Language Tips > Easy English > Odd Question  
 





 
算盤是怎么來的(通訊員稿)
[ 2006-11-27 15:32 ]

算盤是人類歷史上一種重要的計算工具,被稱為"現代計算機"的前身。現在,就讓我們來探究一下算盤的歷史吧!

The origins of the abacus are disputed, as many different cultures have been known to have used similar tools. It is known to have existed in Babylonia and in China, and was likely invented sometime between 1000 BCE and 500 BCE. The first abacus was almost certainly based on a flat stone covered with sand or dust. Lines were drawn in the sand and pebbles used to aid calculations. From this, a variety of abaci were developed; the most popular were based on the bi-quinary system, using a combination of two bases (base-2 and base-5) to represent decimal numbers.

The use of the word abacus dates back to before 1387 when a Middle English word borrowed the word from Latin to describe a sandboard abacus. The Latin word came from abakos, the Greek genitive form of abax ("calculating-table"). Because abax also had the sense of "table sprinkled with sand or dust, used for drawing geometric figures," some linguists speculate that the Greek word may be derived from a Semitic root, ābāq, the Hebrew word for "dust." Though details of the transmission are obscure, it may also be derived from the Phoenician word abak, meaning "sand". The plural of abacus is abaci.

A tablet found on the island of Salamis (near Greece) in 1846 dates back to the Babylonians of 300 BCE making it the oldest counting board discovered so far. It was originally thought to be a gaming board. Its construction is a slab of white marble measuring 149 cm in length, 75 cm in width and 4.5 cm thick, on which are 5 groups of markings. In the center of the tablet are a set of 5 parallel lines equally divided by a vertical line, capped with a semi-circle at the intersection of the bottom-most horizontal line and the single vertical line. Below these lines is a wide space with a horizontal crack dividing it. Below this crack is another group of eleven parallel lines, again divided into two sections by a line perpendicular to them but with the semi-circle at the top of the intersection; the third, sixth and ninth of these lines are marked with a cross where they intersect with the vertical line.

Salamis: 沙拉米斯


(南開大學通訊員田墨供稿 英語點津Annabel 編輯)

 
 
相關文章 Related Stories
 
         
 
 
 
 
 
         
 
 

48小時內最熱門

     

本頻道最新推薦

     
  算盤是怎么來的(通訊員稿)
  彩虹是怎么形成的?
  A smart thief!
  為什么夜晚飛機降落時要調暗機艙里的燈?(通訊員稿)
  No smoking!

論壇熱貼

     
  福娃英文名更改,為何事先不考慮好?
  男扮女裝,女扮男裝?
  請教高人:關于社保方面的詞匯
  評頭論足之妙語連篇
  常用英語口語1000句
  翻譯:老鄉見老鄉,兩眼淚汪汪




主站蜘蛛池模板: 国产一级毛片一区二区三区 | 日韩一区二区三区在线播放 | 男人毛片| 色日韩在线 | 欧美一级毛片激情 | 一区二区三区在线观看免费 | 天堂入口| 欧美日韩视频在线第一区二区三区 | 国产视频中文字幕 | 国产精品变态重口在线 | 亚洲国产精品日韩在线观看 | 亚洲无线一二三区2021 | 国产美女在线一区二区三区 | 日韩一区二区中文字幕 | 国产一级片儿 | 亚洲欧美国产精品专区久久 | 欧美老妇免费做爰视频 | 亚洲一区二区三区久久 | 日本欧美视频在线 | 国产精品亚洲一区二区三区在线观看 | 国产深夜福利 | 国产成人精品免费视频大全软件 | 国产在线观看成人免费视频 | 日本免费大黄在线观看 | 国产精品亚洲专区一区 | 亚洲国产精品热久久2022 | 亚洲日韩精品欧美一区二区一 | 男人的天堂免费视频 | 亚洲综合一区二区三区 | 免费一级肉体全黄毛片高清 | 高清国产精品久久久久 | 国产tv在线观看 | 亚洲日本在线看片 | 日韩欧美国产高清在线观看 | 91精品国产福利尤物免费 | 手机看片1024久久精品你懂的 | 综合 91在线精品 | 国产精品一区久久精品 | 99久久综合狠狠综合久久一区 | 在线观看免费视频国产 | 成人在线精品 |