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萬里長城

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Uploaded by on Jun 7, 2011

音樂:長城謠,鮑比達鋼琴演奏。

萬里長城是人類文明史上最偉大的建築工程,被稱為中古世界七大奇蹟之一。
長城始建於春秋戰國時期,秦朝統一中國後建成;後經歷代王朝陸續修築,漢、明兩代規模更大。
現存的長城為明朝所修築,由渤海之山海關伸展到甘肅省之嘉峪關。
長城平均高度為 7.8 米,平均底部闊 6.5 米,而頂部為 5.8 米。
它每隔 100 米便設一座長方形石台作為瞭望之用的烽火臺。

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