eustachian cushion

例句：

1. 1.He had a sore throat and needed an eustachian cushion to help him breathe.
   他喉咙痛，需要咽鼓管垫来帮助他呼吸。
2. 2. The doctor recommended that he use an eustachian cushion to relieve his ear pain.
   医生建议他用咽鼓管垫来缓解他的耳痛。
3. 3. During surgery, the surgeon used an eustachian cushion to protect the patient's ears.
   在手术期间，外科医生使用咽鼓管垫来保护患者的耳朵。