<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区
          English 中文網 漫畫網 愛新聞iNews 翻譯論壇
          中國網站品牌欄目(頻道)
          當前位置: Language Tips > 每日播報

          Ancient Chinese built Forbidden City with stones dragged on ice

          [ 2013-11-06 10:12] 來源:中國日報網     字號 [] [] []  
          免費訂閱30天China Daily雙語新聞手機報:移動用戶編輯短信CD至106580009009

          Download

          What's instantly noticeable about the Forbidden City, which served as the home of emperors and their households for almost 500 years since the 15th century, are the enormous white stone foundations supporting the historical site's 980 wooden buildings.

          "You go to the Forbidden City and see these massive rocks and you ask yourself: 'How in the world did they ever move this rock here?'" said Thomas Stone of the department of mechanical and aerospace engineering at Princeton University, as quoted by Nature magazine.

          Stone is part of a three-person team that recently discovered how. In a report published on Tuesday in the Proceedings of the National Academy of Sciences, they revealed that Chinese architects hauled the rocks from quarries in Fangshan, located 70 kilometers south of downtown Beijing, on wooden sledges along ice roads.

          Li Jiang, an expert in mechanical engineering from the University of Science and Technology Beijing and a member of the team that performed the study, found ancient Chinese documents describing how people transported a 120-metric-ton rock to repair three major halls in the Forbidden City in 1557.

          The ancient document, Lianggong Dingjian Ji, which translates as "the reconstruction record of two palaces", detailed how workers created man-made ice paths to transport the stone. The process was methodical: every half kilometer, wells were dug to obtain water, which was then poured onto a road and allowed to freeze to reduce the friction between the sledges and the road.

          "The 49-cubic-meter rock was hauled to Beijing in four weeks. That is an average speed of about eight centimeters per second," Li said.

          Studies comparing the ancient Chinese technique of transporting stone with methods from other ancient civilizations show it is more efficient to drag the sledges rather than to use wooden rollers, as the Assyrians did.

          Stone said the team's calculations show that dragging the 120-ton rock with a sledge over ground that was not frozen with ice would have required a labor force of more than 1,500 people. On ice or wet wooden rails, on the other hand, it would have required 330 men. The ancient Chinese practice of hauling stone along an ice road lubricated by water would have needed fewer than 50 men.

          Questions:

          1. Where did the ancient Chinese get the stone to build the Forbidden City?

          2. How were the massive stones hauled to Beijing?

          3. How long did it take to haul the 49-cubic-meter rock?

          Answers:

          1. Fangshan.

          2. On sledges along icy roads.

          3. Four weeks.

          (中國日報網英語點津 Helen 編輯)

          Ancient Chinese built Forbidden City with stones dragged on ice

          About the broadcaster:

          Ancient Chinese built Forbidden City with stones dragged on ice

          Anne Ruisi is an editor at China Daily online with more than 30 years of experience as a newspaper editor and reporter. She has worked at newspapers in the U.S., including The Birmingham News in Alabama and City Newspaper of Rochester, N.Y.

           
          中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883631聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。
           

          關注和訂閱

          人氣排行

          翻譯服務

          中國日報網翻譯工作室

          我們提供:媒體、文化、財經法律等專業領域的中英互譯服務
          電話:010-84883468
          郵件:translate@chinadaily.com.cn
           
           
          主站蜘蛛池模板: 亚洲大片免费| 亚洲精品成人片在线观看精品字幕 | 深夜国产成人福利在线观看| 欧美日本中文| 亚洲中文无码永久免费| 国产午夜福利精品久久2021| 亚洲成a人无码av波多野| 国产精品麻豆成人av网| 中文字幕网红自拍偷拍视频| 国产亚洲国产精品二区| 噜噜噜亚洲色成人网站∨| 性一交一乱一乱一视频| 最新国产色视频在线播放| 农村国产毛片一区二区三区女| 无码精品人妻一区二区三区中| 激情综合网五月婷婷| 绝顶丰满少妇av无码| 亚洲精品国产一区二区三| 亚洲尤码不卡av麻豆| 久久天堂综合亚洲伊人HD妓女| 亚洲国产综合精品 在线 一区| 天天爽天天摸天天碰| 国产福利97精品一区二区| 国产精品99中文字幕| 性XXXX视频播放免费直播| 亚洲av综合久久成人网| 人妻少妇精品中文字幕| 男人狂桶女人高潮嗷嗷| 免费看黄色片| 中文字幕日本一区二区在线观看| 免费大片黄国产在线观看| 亚洲av综合a色av中文| 热99久久这里只有精品| 国产精品蜜臀av在线一区| 香蕉EEWW99国产精选免费| 国产视色精品亚洲一区二区| 精品伊人久久久大香线蕉欧美| 婷婷综合缴情亚洲狠狠| 日韩亚洲AV无码三区二区不卡 | 一本大道久久a久久综合| 长腿校花无力呻吟娇喘的视频|