枕颈关节合并寰枢关节脱位较为少见，截止目前，文献报道多集中于描述其所引起的严重神经功能损伤。
Combined injuries to both the occipital-cervical and atlantoaxial segments are less common and, to date, have only been described with severe neurologic injury.
中寰公司一直致力于卫星导航、智能交通领域新业务的开拓工作。
ChinaNavi has always been engaged in the pioneering work of new businesses such as satellite navigation and intelligent transportation.
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