lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / Měng / wù / guó / de / jiàn / lì / hé / fā / zhǎn

历史课上，老师介绍了蒙兀国的建立和发展。

In history class, the teacher introduced the establishment and development of Khamag Mongol.