move to and fro; shake involuntarily (as from fear, anger, cold, physical weakness, etc.)
feel great fear and anxiety about sth
"His hands were trembling when he signed the document"
Peter..was out of breath and trembling with fright.
出自： B. Potter
Iris's hand trembles but she concentrates on the task.
出自： J. C. Oates
I'm trembling at the thought of tomorrow's examination.
He trembled at the thought of going back to work.
I tremble for his safety.
The children trembled with fear when they saw the policeman.
His voice trembled with emotion.
His hands trembled with eagerness as he opened the letter.
Daddy was trembling with anxiety as to how the talks would go.
The fishermen's wives trembled with their husband's safety.