原材料引用(Materials)

He says this would save lives. Studies show that many people do not want to perform mouth-to-mouth breathing on a stranger for fear of getting a disease.

Cardiac arrest kills more than three hundred thousand people in the United States every year.

信息与事实(Facts)

ɑ  将嘴长大，舌身降低后缩，双唇稍稍收圆，短促有力

hot dot nod

感受与评价(Comments)

终于把所有音标过完了，有几个音标觉得特别难以辨认，后面还要继续练习

累计练习小时数(Hours)

0.5小时