他开始建造具有圆形、方形和其他几何形状的物体。
He began constructing objects that have circles, squares and other geometric shapes.
他那圆形小棚屋，顶上铺的是茅草，墙则用干泥和稻草砌成，与几个世纪来埃塞俄比亚乡村里星罗棋布的住所并无二致。
His circular, thatched-roof hut with walls of dried mud and straw is the same dwelling that has dotted Ethiopia's countryside for centuries.
他使用的是一个小圆形和一个方形。
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