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。
Both men had just begun to swim towards the shore, when they noticed with dismay that the speedboat was moving in a circle.
两个人刚开始向岸边游去,就突然惊愕地发现快艇正在转着圈行驶,