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
