tremulous pulse

例句：

1. 1.The old man's hands were trembling with fear.
   老人的手因恐惧而颤抖。
2. 2.The baby was quivering with excitement.
   婴儿因兴奋而颤抖。
3. 3. The leaves on the trees were quivering in the wind.
   树叶在风中颤抖。