Yes.  We used manikins.  That way, we could practice mouth-to-mouth, and chest compressions.

当然。我们模型练习。样我们就可以练习口对口工呼吸和外压了。

That began to change in 1960, when the combination of mouth-to-mouth ventilation, chest compressions and external defibrillation known as cardiopulmonary resuscitation, or CPR, was formalised.

种情况在1960年开始发生变化，当时被称为心肺复苏术（简称 CPR）的口对口工呼吸、压和外除颤的组合被正式确定下来。

In this scenario, we'regonna utilize the skills of hands-only CPR because we're looking at the lay rescuer or someone who is not comfortable giving mouth-to-mouth resuscitation.

在种情况下，我们会利单手心肺复苏术的技巧，因为我们针对的是非专业救援员或不习惯进行口对口工呼吸的。