zài / gāo / děng / shù / xué / kè / shàng / lǎo / shī / jiè / shào / le / zhèng / duō / bāo / xíng / de / jī / běn / xìng / zhì

在高等数学课上，老师介绍了正多胞形的基本性质。

In the advanced mathematics class, the teacher introduced the basic properties of regular polytopes.