在1842年的一篇医学文献中,首次提到声带反向运动疾病（paradoxic vocal fold movement discorder,PVFMD）,被描述为＂癔症性喉炎＂。1869年,由Mackenzie首次在喉镜下直接观察到声带的这种反常性运动,他认为声门关闭与患者的喘鸣直接相...在1842年的一篇医学文献中,首次提到声带反向运动疾病（paradoxic vocal fold movement discorder,PVFMD）,被描述为＂癔症性喉炎＂。1869年,由Mackenzie首次在喉镜下直接观察到声带的这种反常性运动,他认为声门关闭与患者的喘鸣直接相关。PVFMD患者平时的声带运动是正常的,表现为间歇性的声带收缩引起呼吸困难和喉部紧缩感。展开更多
嗓音的产生需要呼吸和发声功能的同步化,这是一个复杂的过程。异常的呼吸-发声运动可能导致一种复杂疾病发生,这种疾病与间断性呼吸困难和喘鸣相关,即：声带矛盾运动（paradoxical vocal fold movement disorder,PVFM）,也称为声带功能...嗓音的产生需要呼吸和发声功能的同步化,这是一个复杂的过程。异常的呼吸-发声运动可能导致一种复杂疾病发生,这种疾病与间断性呼吸困难和喘鸣相关,即：声带矛盾运动（paradoxical vocal fold movement disorder,PVFM）,也称为声带功能障碍,其吸气时声带内收,因此限制了气道开放，与哮喘的呼吸道症状相似，常被误诊为哮喘。展开更多
If you ask a linguist the question what language is, most likely you will get an answer like this: " Language is a system of arbitrary vocal symbols used for human communicatin ".Note here that there are som...If you ask a linguist the question what language is, most likely you will get an answer like this: " Language is a system of arbitrary vocal symbols used for human communicatin ".Note here that there are some implicit assumptions involved in this definition: language equals a system of symbols and language is for communication. If you have an inquisitive mind, you may not settle for the answer given and ask again:"Does that mean that those symbols are展开更多
文摘在1842年的一篇医学文献中,首次提到声带反向运动疾病（paradoxic vocal fold movement discorder,PVFMD）,被描述为＂癔症性喉炎＂。1869年,由Mackenzie首次在喉镜下直接观察到声带的这种反常性运动,他认为声门关闭与患者的喘鸣直接相关。PVFMD患者平时的声带运动是正常的,表现为间歇性的声带收缩引起呼吸困难和喉部紧缩感。
文摘嗓音的产生需要呼吸和发声功能的同步化,这是一个复杂的过程。异常的呼吸-发声运动可能导致一种复杂疾病发生,这种疾病与间断性呼吸困难和喘鸣相关,即：声带矛盾运动（paradoxical vocal fold movement disorder,PVFM）,也称为声带功能障碍,其吸气时声带内收,因此限制了气道开放，与哮喘的呼吸道症状相似，常被误诊为哮喘。
文摘If you ask a linguist the question what language is, most likely you will get an answer like this: " Language is a system of arbitrary vocal symbols used for human communicatin ".Note here that there are some implicit assumptions involved in this definition: language equals a system of symbols and language is for communication. If you have an inquisitive mind, you may not settle for the answer given and ask again:"Does that mean that those symbols are
