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。
I was not surprised to find that the machine still refused to work after I had reassembled it,
等我装完后,那台割草机仍然一动不动,对此我倒并不感到吃惊。