If I have a painting of a facade, I can consider it's not just that particular building, but probably it also shares the same grammar of buildings where we lost any information.
如果我有一张建筑的照片， 我可以认为这不仅仅反映的是那一座特定的建筑的特征， 它可能也反映了同时代那些建筑的特征， 而那些建筑可能正是我们所知甚少的。