Lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / qì / dān / zú / de / shēng / huó / hé / wén / huà

历史课上，老师介绍了契丹族的生活和文化。

In history class, the teacher introduced the life and culture of the Khitan people.