middle-ear muscles

例句：

1. 1. Middle-ear muscles play a crucial role in hearing.
   中耳肌肉在听力中起着至关重要的作用。
2. 2. The doctor advised the patient to exercise regularly to strengthen middle-ear muscles.
   医生建议病人定期锻炼，以增强中耳肌肉。
3. 3. During sleep, the muscles of the neck and head relax, allowing for better circulation of blood through the middle-ear muscles.
   睡眠时，颈部和头部的肌肉放松，使通过中耳肌肉的血液流动更好。