无痛致死painless death 无痛致死术practice of painless death 无伤nonmalefence. 心肺死亡标准Cardiorespiratory criterion of death 养老院rest home 医助自杀physician-assisted suicide 意外死亡accidental death 优死euthanasia 致死cause of death 准自杀para-suicide 自然死natural death 自杀suicide 自杀未遂attempted suicide 自愿安乐死voluntary euthanasia 尊严死death with dignity无痛致死 painless death 无痛致死术 practice of painless death 无伤 nonmalefence. 心肺死亡标准 Cardiorespiratory criterion of death 养老院 rest home 医助自杀 physician-assisted suicide 意外死亡 accidental death 优死 euthanasia 致死 cause of death 准自杀 para-suicide 自然死 natural death 自杀 suicide 自杀未遂 attempted suicide 自愿安乐死 voluntary euthanasia 尊严死 death with dignity