yī / xué / kè / shàng / lǎo / shī / jiè / shào / le / yīn / dào / bàn / zhè / yī / jiě / pōu / jié / gòu

医学课上，老师介绍了阴道瓣这一解剖结构。

In anatomy class, the teacher introduced the hymen as an anatomical structure.