spheren.范围；领域；球；球体；天体vt.形成球体；包围；围绕sphere of circulation流通范围sphere of consumption消费范围sphere vessels of Lpg液化气球罐spheres normal impact球体正碰撞sphere structure SVMs球结构支持向量机sphere bounding boxes球形包围盒sphere heat condition球体导热sphere of examination考试场域sphere of instability不稳定区sphere gap measurement测量球隙