1.Their language is of unknown origin and cannot be placed within any standard classification.
他们的语言起源不明，也无法根据任何通常分类来归类。
2.Anomalous vertebral arteries should be included in the differential diagnosis of the upper cervical lesion of unknown origin.
椎动脉畸形应该作为不明原因上颈椎病变的鉴别诊断。
3.Objective To explore the causes and diagnostic method of the long-term fever of unknown origin(FUO).
目的探讨不明原因长期发热（FUO）的病因及诊断方法。
4.Conclusion: The application of lymphocyte injection with nursing technology is effective for women with unknown origin habitual abortion.
结论：淋巴细胞注射及护理技术的应用在治疗原因不明性习惯性流产中疗效确切，具有操作有效、无不良反应等特点。
5.A person of unknown origin are bound to be acting suspiciously.
一个来历不明的人必然有些行迹可疑。
6.Also, genetic studies included in the Air Force file refer to some of her DNA as human and some as of unknown origin.
包含在空军档案的遗传研究报告也提及到她的一些DNA如同人类和一些像不知道的源头处。
7.Feline idiopathic cystitis (FIC) literally means an inflammation of the urinary bladder in cats of unknown origin.
依字面解释，猫自发性膀胱炎（FIC）是一种不明原因引起的猫膀胱发炎。
8.Myositis: Inflammation of muscle tissue, often from bacterial, viral, or parasitic infection but sometimes of unknown origin.
肌炎：肌肉组织的炎症，常为细菌、病毒或寄生虫感染所致，但有时病因不明。
9.Along the voyage , painted armed vessels of unknown origin will appear to extort money from the refugees .
在航路上，不知来历重新上漆的军舰会出现来敛财。
10.Fever of unknown origin (FUO) remains a challenging clinical problem despite recent advances in diagnostic tools and techniques.
不明原因发热（FUO）仍然是一个具有挑战性的临床问题，尽管最近取得的进展的诊断工具和技术。