求翻译：长城是古代中国在不同时期为抵御塞北游牧部落联盟侵袭而修筑的规模浩大的军事工程的统称。长城东西绵延上万华里，因此又称作万里长城。现存的长城遗迹主要为始建于14世纪的明长城，西起嘉峪关，东至辽东虎山，全长8851.8公里，平均高6至7米、宽4至5米。长城是我国古代劳动人民创造的伟大的奇迹，是中国悠久历史的见证。它与白宫门，兵马俑一起被世人视为中国的象征。是什么意思？

The ancient Great Wall of China in different periods for the Union to resist the attack of Saibei nomads of the vast scale of military construction projects referred to. Ten thousand li Great Wall stretches things, it is also known as the Great Wall. Existing remains of the Great Wall was built in t

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The Great Wall was the ancient times China for resists the scale vast military engineering general designation in the different time which the area north of the Great Wall nomadic tribe alliance attack constructed.The Great Wall thing is continuous the up to ten thousand Chinese miles, therefore is

The great wall was at various times in ancient China to counter the saibei invasion of nomadic tribes collectively, building size, is the huge military engineering. The great wall stretches for thousands of Li and therefore also known as the great wall. Extant remains of the great wall was built mai

The great wall was at various times in ancient China to counter the saibei invasion of nomadic tribes collectively, building size, is the huge military engineering. Wall stretches things stretched for thousands, therefore also called great wall. Existing great wall ruins were built mainly in 14th ce