And once you get that nice strong sound, you round your lips, okay, you can put your finger here to make sure that the lips push forward and you're not doing something funny like " Lr" .

当你发出饱满而有充实的 R 音后，嘟起嘴巴，你可以把手指放在这里以确保嘴唇向前推，而不是发“Lr”这样的音。