not breathe a syllable

例句：

1. 1.He was so quiet that no one could hear him speak.
   他非常安静，以至于没人能听到他说话。
2. 2.The old man sat there, not breathing a syllable.
   老人坐在那里，一句话也不说。
3. 3. She was so nervous that she couldn't even breathe a syllable.
   她太紧张了，一句话也说不出来。