貝殼狀結構任一種類似於貝殼的形狀結構，例如人的外耳
Any of various structures, such as the external ear, that resemble a shell in shape.
（先天性）閉鎖，無孔正常的身體孔或管道，如肛門、腸或外耳道的缺失或閉合
The absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal.
滬公網安備 31011502000490號
電信業務許可證編號：滬B2-20190700
