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症加重.Tear the sheet of stamps along the perforations.沿齿孔把邮票撕开。Tear off the form along the perforations and ...