Once you're in position, slightly tilt your head back and extend the tip of your tongue just past your bottom lip.

到达位置后，轻轻向后仰头，伸舌到稍微超过下唇。

youdao

Once you're in position, slightly tilt your head back and extend the tip of your tongue just past your bottom lip.

到达位置后，轻轻向后仰头，伸舌到稍微超过下唇。

youdao