让潜水员缩起小嘴唇，仔细观察脸部两边的表情是否一致！

Ask the diver to purse the lips. Look carefully to see that both sides of the face have the same expression.

youdao

让潜水员缩起小嘴唇，仔细观察脸部两边的表情是否一致！

Ask the diver to purse the lips. Look carefully to see that both sides of the face have the same expression.

youdao