A negative face has an outward normal pointing in a direction opposite that of the positive x-axis.
负向的外法线指向与正x轴相反的方向。
The touch point deviates eastward with respect to the central normal of the shock source, and the deviation Angle increases during the outward propagation of the shock system.
上述切触点相对激波源中心法线东偏，且东偏角度在激波系统向外传播过程中不断增加。
In contrast, low grade papillary tumors demonstrate densely arranged but normal-shaped small cells extending outward from fibrovascular cores.
相反，低度恶性乳状瘤排列密集，但正常形状的小细胞从纤维血管核心向外蔓延。
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