cryptogenic

an inexplicable fire

一场原因不明的火灾

Etiology investigation of the elderly patients with chronic cough

老年人不明原因慢性咳嗽的病因分析

And in unclear infertile women , it reaches to 70%~80%. Statistically .

在不明原因的不孕妇女中则高达70%～80%。

Reserch on the Unclear OPEN Defect of the Panel in the LCM;

关于LCM中屏的不明原因OPEN的改善研究

Conclusion Immune factor was the chief cause of infertility in women.

结论:免疫因素为女性不明原因不孕、育症的主要原因。

That explains why he's not here.

那说明了他不在这儿的原因。

This is not possible for a number of reasons.

种种原因表明，这是不可能的。

Your search failed for an unknown reason. Please try again later.

您的搜索失败，原因不明。请稍候再试。

The Value of Computeriged Tomography in the Investigation of Unexplained Hemoptysis

胸部CT在不明原因咯血中的诊断价值

I do not understand this cause of prohibition.

我不明白这项禁令的原因。

The immediate cause of death is unknown.

造成死亡的直接原因不明.

Clinical application of medical thoracoscopy in unknown pleural effusion

胸腔镜在不明原因胸腔积液中的应用

Hypertension for which no recognizable cause can be found is called essential or idiopathic.

不明原因的高血压称为特发性或原发性高血压。

having the reason or cause not made clear.

原因或者动机不明确。

sudden unexplained death syndrome

不明原因瘁死综合症

Study on Immune Etiological Mechanism of Unexplained Recurrent Spontaneous Abortions;

原因不明反复流产免疫相关因素的研究

The Impact of Sperm Factor on Unexplained Recurrent Pregnancy Loss;

精子因素对不明原因反复自然流产的影响

The Research Progress in Immune Factors Correlating with Unexplained Recurrent Spontaneous Abortion

原因不明复发性流产的免疫因素研究进展