If the medical cause of death is unknown or if there is reason to believe that it may be due to unnatural causes, then the case has to be reported to the Coroner.
如果医学死因不明知或者有理由相信是非自然原因导致死亡，那么案件就必须报告给验尸官。
Materials and Methods Of 25 cases with ureteral stricture and upper hydroureterosis, 20 were due to ureterolithotomy and 5 non-external compressive stricture of unknown cause.
材料与方法25例经影像学确诊为输尿管狭窄并上尿路积水中，20例为输尿管取石术后狭窄，5例为不明原因非外压性狭窄。
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。
Due to the southeast Asia market prospect is unknown, keep watching, hot coil importer about China market demand buyer may cause a callback.
由于市场前景不明，东南亚热卷进口商保持观望，买家担心中国市场需求下滑可能导致市场大幅回调。
As a result of maternal infection by an unknown virus and cause death, infants are "live" after 72 hours, due to a viral infection and mortality.
由于母体感染了一种不知名的病毒而导致死亡，婴儿也在“活”了72小时后，因受同一病毒感染而夭折。
The cause is unknown, but growing evidence suggests that it may be due to a combination of environmental and genetic factors.
其确切病因尚不明了，但有证据表明，帕金森病可能与环境和遗传等因素有关。
There are many reasons to cause divergence. One of the most important reasons is due to the unknown statistical properties of system noise and measurement noise.
导致发散的原因很多，其中很重要的原因就是缺乏对系统噪声和测量噪声统计特性的了解。
There are many reasons to cause divergence. One of the most important reasons is due to the unknown statistical properties of system noise and measurement noise.
导致发散的原因很多，其中很重要的原因就是缺乏对系统噪声和测量噪声统计特性的了解。
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