The stone Archway of Longchang is a stereo history which preserved some very important ancient civilization fragments of ancient post road and stone sculptures.
隆昌石牌坊是一部“立体史书”，是千年古驿道文化，隆昌青石文化的重要人文历史遗存。
We went through a stone archway into the courtyard.
我们穿过石拱门进入院子。
In architecture, a keystone in an archway or doorway is the stone that holds the whole thing together, and keeps it from collapsing.
建筑学中，拱道或门口的拱心石，是把建筑整体连接在一起来防止它倒塌的石头。
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