名詞 eardrum:

1. the membrane in the ear that vibrates to sound
   同義詞：tympanum, tympanic membrane, myringa

1. My right eardrum have become infect.
   我的右耳鼓已經(jīng)感染了。
2. An instrument for examining the interior of the ear, especially the eardrum, consisting essentially of a magnifying lens and a light.
   耳鏡，檢耳鏡檢查耳內(nèi)部(尤其是中耳)的儀器，主要包括一個放大鏡和光源

ear.drum

n.Anatomy （名詞）【解剖學】
The thin, semitransparent, oval-shaped membrane that separates the middle ear from the external ear.Also called tympanic membrane ,tympanum
耳鼓：一種薄的、橢圓形的半透明膜，將中耳與外耳分隔開來也作 tympanic membrane,tympanum