发颤音

例句：

1. 1. The oldman was so weak that he could barelyspeak.
   老人太虚弱了，几乎说不出话来。
2. 2. Hervoice trembled as shespoke.
   她说话时声音颤抖。
3. 3. Hechoked on his drink and startedto tremble.
   他喝饮料时呛到了，开始颤抖。