the cross section of an octahedron is a square.
八面
的横断面是正方形。
词the cross section of an octahedron is a square.
八面的横断面是正方形。
Crystal Habits include the cube, octahedron and pyritohedron (a dodecahedron with pentagonal faces) and crystals with combinations of these forms.
晶形态常呈立方、五角十二面，较少呈八面，或集合晶簇。
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