Lì / shǐ / kè / shàng / lǎo / shī / jiǎng / jiě / le / Ní / bù / chǔ / tiáo / yuē / de / bèi / jǐng / hé / yǐng / xiǎng

历史课上，老师讲解了尼布楚条约的背景和影响。

In history class, the teacher explained the background and impact of the Treaty of Nerchinsk.