单词 | Great Wall of China |
释义 | Great Wall of China A line of fortifications across northern China. Originally built during the Qin Dynasty (221-206 BC) by connecting earlier fortifications, it was subsequently rebuilt and altered many times. The wall reached its greatest extent during the improvements of the Ming Dynasty (1368-1644), when it was expanded to about 6,400 km (4,000 mi) long. |
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