tū / duō / bāo / xíng / shì / duō / miàn / tǐ / zài / gāo / wéi / kōng / jiān / zhōng / de / tuī / guǎng

凸多胞形是多面体在高维空间中的推广。

A convex polytope is the generalization of a polyhedron to higher dimensions.