Beacon towers were also built at fixed intervals for passing on military information. All these indicate the important role of the Great Wall in military defense.
每隔一定距离就建造一座烽火台，用来传递军情在长城的整个军事防御体系中，这一切都起着非常重要的作用。
The Great Wall of defense is the most important element.
是万里长城防御工程中最为重要的组成部分之一。
Walls are usually viewed as a defense project. What are the key parts of the Great Wall?
城墙一般被看成防御工程，它有哪些重要部位呢？
OK! The Great Wall is one of the wonders of the world. And nowadays it ACTS as not a defense against the offensive. But the precious historical relic which welcomes tourists from all over the world.
好的，长城是世界奇观之一，现在它并不像像古代一样是军事防御，而是作为一个历史占迹欢迎全世界的游客。
The ancient joint defense compared with today's network function of Great Wall has become a dream in the memory.
远古的联防与现今的网落长城的功能已成记忆的梦。
West of the Pass, after a well-preserved 3x3 defense tower, the Great Wall stops at a steep cliff.
关口以西的长城城墙，在经过一个保存完整的三眼楼之后止于一段陡峭的山崖。
Chapter 4 analyzes the influence of the great wall-military towns defense system of the Northern Wei on environment. In the beginning of.
第四章则分析了北魏长城—军镇防御体系对环境的影响及其后果。
Chapter 4 analyzes the influence of the great wall-military towns defense system of the Northern Wei on environment. In the beginning of.
第四章则分析了北魏长城—军镇防御体系对环境的影响及其后果。
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