Specialization also provides support for multi-level or hierarchical specializations, which allow more general topic types to serve as the common denominator for different specialized types.
专门化还为多层或分级规范提供了支持，允许更一般的主题类型作为不同特殊类型的公共基础。
According to compression degree in image combined with clinical symptom and signs, the responsible levels were determined for multi-level or jumping OLF patients;
对于多节段及跳跃性黄韧带骨化症患者，根据影像学压迫程度，结合临床症状及体征，确定责任节段；
According to compression degree in image combined with clinical symptom and signs, the responsible levels were determined for multi-level or jumping OLF patients;
对于多节段及跳跃性黄韧带骨化症患者，根据影像学压迫程度，结合临床症状及体征，确定责任节段；
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