Airplane ear
Overview Airplane ear (ear barotrauma) is the stress on your eardrum that occurs when the air pressure in your middle ear and the air pressure in the environment are out…
VOA英语教学网 - VOA LEARNING ENGLISH
一个让你免费在线学习VOA英语的好地方! 无须报名, 不收学费, 全年无休, 保证提高! (^_^)
Overview Airplane ear (ear barotrauma) is the stress on your eardrum that occurs when the air pressure in your middle ear and the air pressure in the environment are out…