原因不明的死亡是难以接受的。
造成死亡的直接原因不明。
西班牙警方表示，死亡原因不明，现场也没有打斗的迹象。
Spanish police said the cause of death was unknown and there were no signs of violence.
虽然官员声称死亡的原因是不明病毒，该监狱的总监自己也以疏忽的罪名被逮捕了。
Though officials claim that the deaths were due to a mysterious virus, the prison director is now himself under arrest, charged with negligence.
在发病前约10天左右，在病人家里出现不明原因的鸡禽死亡，她曾参加死禽处理工作。
Approximately, 10 days ago, there were unexplained deaths of chicken in the patient's household. She participated in the disposal of the dead poultry.
不明原因的死亡并不常见，但英国的统计数字表明，16岁至64岁的人群中，每年约有二十万分之一的人突发死亡。
Unexplained deaths aren't common, but UK figures suggest that around 1 in 200, 000 people between 16 and 64 die suddenly each year.
但有时，卡通幽灵会出现在公寓楼旁边，代表在那里发生过不正常或不明原因的死亡事件。
But on occasion, cartoon ghosts appear next to an apartment tower, representing an unnatural or unexplained death that took place there.
主要由麻醉方面的原因引起死亡的14例中，属麻醉选择失误者4例、麻醉处理不当8例，操作失误1例，原因不明1例。
Of the 14 cases related to anesthesia 4 were due to error in selection and 8 due to mismanagement of anesthesia, 1 technical error and 1 with unknown cause.
主要由麻醉方面的原因引起死亡的14例中，属麻醉选择失误者4例、麻醉处理不当8例，操作失误1例，原因不明1例。
Of the 14 cases related to anesthesia 4 were due to error in selection and 8 due to mismanagement of anesthesia, 1 technical error and 1 with unknown cause.
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