Results The middle line through ANS and perpendicular to zygomaticofrontal line has less mean of middle structure index and side middle structure index.
结果以过ANS点垂直于两侧颧额点连线的直线为面中线，其正中结构指数和侧方结构指数均值较小。
2
The gnomon in the middle is perpendicular to the plate, parallel to the earth's axis, and points to the celestial North Pole (near the north Star).
晷针垂直于晷盘，平行于地轴，指向天北极(北极星附近)。
3
Hold the thermometer perpendicular to the middle of the forehead until a single point of light appears.