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In addition, chronic tympanitis, perforations, swimming is also easy to make water.此外, 患有慢性中耳炎 、 鼓膜穿孔的人, 下水游泳也容易使炎癥加重.Tear the sheet of stamps along the perforations.沿齒孔把郵票撕開。Tear off the form along the perforations and ...