zitterbewegung

例句：

1. 1. The old man was visibly shaking as he spoke.
   老人说话时明显在颤抖。
2. 2. She shivered in the cold night air.
   她在寒冷的夜晚里发抖。
3. 3. He quivered with fear when he heard the news.
   他听到这个消息时吓得发抖。