名词鼓室，中耳
1. On one occasion my son suffered from inflammation of the middle ear and we hurried to a leading pediatric hospital at about 4 am.
2. Another theory is that yawning helps equalize pressure in the middle ear with outside air pressure.
noun
1. danci.911cha.com
1. the main cavity of the ear
between the eardrum and the inner ear
Synonym: tympanic cavity tympanum