With traditional CPR, you give two breathes to force air into the lungs.

来自VOA Special English:
If a person's heart stops, would you know how to perform CPR? CPR, or cardiopulmonary resuscitation, can save a life and reduce the risk of brain damage from loss of oxygen.【 With traditional CPR, you give two breathes to force air into the lungs. 】Then you push hard on the chest thirty times. You repeat these two steps until the victim wakes up or medical help arrives.

参考上下文，字面意思是：用心肺复苏措施抢救一个生命（a life）,需要强制送两口气到病人的肺里。病人是被动呼吸的。如何做到？用人工呼吸还是别的办法？然后用力压病人胸部30次，重复以上两步直到病人醒来或医护到来。