原材料引用（material） Four hundred and thirty-nine received chest presses only...

原材料引用（material） In all cases，witnesses saw the event happen.More than on...

2019-01-07 Yanni的S英语晨读7期 D15 原材料引用（material） Doctors in Tokyo led the re...

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原材料引用（material） However，a new Japanese study questions the usefulness of...

原材料引用（material） CPR keeps blood and oxygen flowing to the heart and brai...

原材料引用（material） CPR combines breathing into the victim's month and repea...

原材料引用(Material) Without lifesaving measures，the brain starts to die with...

原材料引用(Material) The heart stops pumping blood.The person stops breathing...