Lì / shǐ / kè / shàng / lǎo / shī / bō / fàng / le / yí / duàn / hú / yuè / ràng / wǒ / men / liǎo / jiě / gǔ / dài / de / yīn / yuè / jiāo / liú

历史课上，老师播放了一段胡乐，让我们了解古代的音乐交流。

In history class, the teacher played a piece of Hu music to help us understand musical exchange in ancient times.