lǎo shī / xiān / ràng / wǒ men / liàn xí / dān yuán yīn / zài / liàn xí / yóu / liǎng gè / yuán yīn / zǔ chéng / de / fù hé yùn mǔ

老师先让我们练习单元音，再练习由两个元音组成的复合韵母。

The teacher first had us practice monophthongs and then practice compound finals made up of two vowels.