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。
In summer, people like to go sailing, swimming, horse-riding, and rock-climbing in the mountains.
夏天,人们喜欢去扬帆航行、游泳、骑马,还到山里去攀岩。