kè / táng / shàng / lǎo / shī / jiè / shào / le / Sī / dà / lín / zhǔ / yì / de / zhǔ / yào / tè / diǎn

课堂上，老师介绍了斯大林主义的主要特点。

In class, the teacher introduced the main characteristics of Stalinism.