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。
We might say that justice has been done when a man's innocence or guilt has been proved beyond doubt.
当某人被证据确凿地证明无罪的时候,我们也许会说正义得到了伸张。