古代的时候，人们每隔一定的距离就会设定驿站。
In ancient time, courier station would be established at regular intervals.
这些船每隔一定的距离就会被锚定，它们承载着桥的重量。
The boats are anchored at regular distances and they carry the weight of the bridge.
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。
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。
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.
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