Translate the following passage into English:
    長城，東起山海關(guān)，西至嘉峪關(guān)，橫跨中國北部，全長六千多公里，號稱“萬里長城”，是中國古代勞動人民智慧的結(jié)晶，是世界偉大的建筑奇跡之一。
    中國最早的長城，遠在公元前七世紀就已經(jīng)出現(xiàn)了。公元前221年，秦始皇統(tǒng)一六國后，把秦、趙、燕三國原有長城連接起來，綿延萬余里，奠定長城的規(guī)模，以后歷代均有修筑?，F(xiàn)存長城，是明代修建的。
    長城依山勢蜿蜒起伏，宛如蒼龍凌空飛舞，十分雄偉壯觀，是無數(shù)中外游人的登臨勝地。
    參考譯文：
    Starting at Shanhai Pass in the east and ending up at Jiayu Passin the west， the Great Wall traverses up and down overnumerous mountains and valleys in five of China’s northernprovinces and two autonomous regions. As it extends over adistance of more than 6000 kms， it is called in Chinese theWanmlichangcheng which means “Ten Thousand Li Long Wall”.It is a symbol of intelligence of the working people of old days， and also one of the greatarchitectural miracles in the world.
    Construction of the wall first began in the 7th century B.C. after Qin Shi Huang， the first emperorof the Qin Dynasty (221—206BC) achieved the unification of China in 221 B.C... He had thefortification walls of the three kingdoms Qin， Zhao and Yan linked up to be a continuous wallextending more than ten thousand li (a li = 1/2 kms)， which formed the essential size of thepresent-day Great Wall. Since then the later dynasties continued to repair and build the wall. Thegreat wall as it stands today was restored and reinforced during the Ming Dynasty.
    The great Wall winds like a giant serpent along the lofty myriad mountains. It is one of the mostfamous attractions to visitors.