辙迹 辙迹的英文 英语翻译 rut 拓展翻译 辙rhyme; rut 辙叉角angle of the crossing 圆形轨迹circular trace 缘切迹incisurae marginalis 长痕迹反射long-trace reflex 真轨迹角true track dihedral angle 真迹authentic work 枕前切迹incisurae preoccipitalis 枕叶前切迹preoccipital notch