原材料引用(Materials)
It said people should increase the number of chest presses from fifteen to thirty for every two breaths given.
Gordon Ewy is a Heart doctor at the University of Arizona Collagen of Medicine in Tucson.
信息和事实（fact）
【m】双唇闭拢，软腭下垂，气流从鼻腔泄出声带振动。要点在于闭拢双唇。
【⺆】舌后部抬起并抵住软腭，阻止气流从口腔泄出。软腭下垂，发音时气流从鼻腔泄出，声带振动。
【n】舌尖紧贴上齿龈形成阻碍，气流从鼻腔泄出发出声音，同时声带振动。
感受与评价(camment)
三个音都感到振动了，但2和3，感觉自己的音是从喉咙发声，没感觉到鼻腔里有气流过，不知道自己那里错了
练习小时数(hours)
60分钟
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