...的关系称为“首属关系”（PrimaryRelation， 也译 作原始关系）；通过媒体建立的间接关系称为“次级关系”（Secondary Relation），在通讯和媒体越来越发达的今天，人与人的次级关系的建立变 得越来越方便。
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In order to achieve Class-A surface quality for primary and secondary surfaces, the surfaces must have G3 Curvature conditions in relation to each other.
在为了达到A级表面质量的小学和中学的表面，表面必须具有的G3曲率条件，在相互关系。
This paper briefly summarizes all the kinds of the environmental disasters in the area, and analyses the genetic relation between the primary and secondary disasters.
简要总结了各种煤矿环境地质灾害，分析了原生灾害及其次生灾害的成生联系。
Methods: Maxillofacial ct scan and secondary reconstruction were performed in the diagnosis of patients who needed to estimate the relation between maxillary sinus and molar.
方法：对上颌牙齿拔除、种植牙、肿瘤等需要显示上颌窦与上颌后牙区关系的患者，进行颌面专用CT扫描和重建成像。
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