舌位 meaning in English

position of the tongue
tongue position

Experiment with the position of your tongue , cheek muscles , jaw and anything else for a wide variety of whistle sounds
试着调整舌位、面部肌肉、上下颌和其他部位可以吹出相当丰富的哨音。
Experiment with the position of your tongue ( either near the roof of your mouth , or behind your bottom teeth works well ) and also with the positioning of your lips ( try puckering them further )
试着调整舌位（将舌头或靠近上颚或靠近齿后）和唇型（如撅得更向前些），以发出不同的音。