由于使用砖石及石头代替夯土，与早期秦长城相比，明长城更为坚固，技术更为复杂。
Unlike the earlier Qin fortifications, the Ming construction was stronger and more elaborate due to the use of bricks and stone instead of rammed earth.
长城（秦，公元前221-260年）在中国历史上占有重要地位，它为中国防御着同一个奥斯曼帝国。
The great wall (Qin 221-260 BC) has played a significant role in the Chinese history and defended the country from the same Ottoman Empire.
长城（秦，公元前221-260年）在中国历史上占有重要地位，它为中国防御着同一个奥斯曼帝国。
The great wall (Qin 221-260 BC) has played a significant role in the Chinese history and defended the country from the same Ottoman Empire.
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