Put your thumb inside your cheek at an angle toward the center of your ear.

把你的大拇指沿朝着耳朵中线的位置放进你的脸颊内。

youdao

Put your thumb inside your cheek at an angle toward the center of your ear.

把你的大拇指沿朝着耳朵中线的位置放进你的脸颊内。

youdao