lǎo / shī / ràng / xué / shēng / zhù / yì / qū / fēn / shé / jiān / yīn / hé / shé / miàn / yīn / de / fā / yīn / wèi / zhì

老师让学生注意区分舌尖音和舌面音的发音位置。

The teacher asked the students to pay attention to the difference in articulation between apical and laminal consonants.