You must develop the muscles of your speech organs to produce unfamiliar sounds.
所以你必须训练和发展你的发音器官(声带、舌、口、鼻腔等)的肌肉,以便发出陌生的(另外一种语言)声音。
Before very long the parents will be complaining that the child is so secretive and never tells them anything,
不要很久,家长就会抱怨孩子守口如瓶,什么事也不告诉他们,