The chest compression component, he suspects, is also easier for most people to perform than the mouth-to-mouth.

与口对口人工呼吸的操作相比较，胸外按压的操作对大多数人来说更容易一些。

If there is no heart beat and no pulse and if no trained medical help is available, start'external chest compression'.

如果没有心跳，没有脉搏，如果没有受过训练的医疗帮助，可开始对外胸部压缩'。

New data show that when bystanders without emergency medical training try CPR using only chest compression, the results can be better than if they also attempt mouth-to-mouth.

最新资料显示，当未经训练的路人仅实施心肺复苏（CPR）的胸腔按压部分，好过人工呼吸。