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。
Looking at his watch, he saw that it was one o'clock, but the bell struck thirteen times before it stopped.
他一看表,才1点钟,可是那钟一边敲了13下才停。