lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / gǔ / dài / fān / guó / yǔ / zhōng / yāng / zhèng / fǔ / de / guān / xì

历史课上，老师介绍了古代藩国与中央政府的关系。

In history class, the teacher explained the relationship between ancient vassal states and the central government.