建筑工人们已经完成了屋顶的建造。
富有经验的工程师和技师们采用经过数世纪苦心钻研验证的建筑材料和科学规律，花费了10年时间最终建造完成。
It took skilled engineers and technicians ten years to construct, using materials and laws we have hammered out over centuries.
一旦最初的建筑作品已被放置你使用你的锤子片上完成建造它。
Once the initial building piece has been placed you use your Hammer on the piece to finish off constructing it.
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