You take a sheet of clay, you twist it at one end, you join one end onto the other and it goes from being a flat, two edged, two surfaced piece to having only a single edge and one single continuous surface.
你取下一塊粘土,將其一端扭轉,然後將一端連接到另一端,它就會從一個平整的、有兩個邊、兩個面的作品變成只有一個邊和一個連續面的作品。