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。
People become quite illogical when they try to decide what can be eaten and what cannot be eaten.
在决定什么能吃而什么不能吃的时候,人们往往变得不合情理。