N-UNCOUNT =) cardiopulmonary resuscitation .心肺复苏;人工呼吸CPR is a medical technique for reviving someone whose heart has stopped beating by pressing on their chest and breathing into their mouth. CPR is an abbreviation for (缩略=) cardiopulmonary resuscitation .心肺复苏;人工呼吸 [medicine]
McMullen performed CPR while other bystanders called 911.