情节大要
Perhaps the oldest method of building known to humankind is the simple stacking of stones. If you choose the right stones, and prepare and place them in exactly the right position, a wall built in this way will be at least as sturdy as one built using mortar. This craft seems to have been overtaken by time, made obsolete by modern techniques. But this is precisely the reason th...
深夜追剧指南 
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