lǎo / shī / xiān / shì / fàn / shé / jiān / chàn / yīn / de / fā / yīn / fāng / fǎ / rán / hòu / ràng / xué / shēng / zhú / gè / liàn / xí

老师先示范舌尖颤音的发音方法，然后让学生逐个练习。

The teacher first demonstrated how to pronounce the alveolar trill and then had the students practice one by one.