Often there is no obvious cause.
哭闹经常无明显原因。
There was no obvious cause of gastrointestinal infection and history of gut diseases.
没有明显的胃肠道感染诱因，并且既往无胃肠道疾病史。
Petrous ICA aneurysms can be traumatic or mycotic in origin, but in the majority of cases, there is no obvious cause, and such lesions are considered congenital in origin.
颈内动脉岩段动脉瘤可以是创伤或真菌感染所致，但在大多数病例中，没有明确的病因，通常被认为是先天性。
There's no obvious sort of other thing that could cause this.
没有其他明显种类的事物，可能会引起这样的记号。
It is a clear, sunny day and the roads contain no obvious hazards that would cause problems with traffic.
这是一个阳光明媚、晴朗无云的日子，道路上没有任何明显会导致交通堵塞的危险物。
Conclusion Both investment materials cause no obvious changes on biological characteristics of pure titanium castings with the existing of surface structural changes.
结论两种包埋料所致纯钛铸件表面结构的变化未导致其生物学性能方面的明显改变。
Most cases of Parkinson's disease are termed sporadic, meaning that there is no obvious genetic cause, but there are inherited forms of Parkinson's.
大部分帕金森氏症病例被认为是散在、偶发的，也就是说其中没有明显的遗传因素，但是还存在一些遗传的帕金森氏症类型。
Most cases of Parkinson's disease are termed sporadic, meaning that there is no obvious genetic cause, but there are inherited forms of Parkinson's.
大部分帕金森氏症病例被认为是散在、偶发的，也就是说其中没有明显的遗传因素，但是还存在一些遗传的帕金森氏症类型。
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