And, in terms of direction, it will be normal to the surface.
对于方向，则是曲面的法方向。
The paths of incidence and reflection are in a plane normal to the surface.
入射和反射的路径都在与表面垂直的平面内。
And then there is the normal force perpendicular to the surface.
这个力，垂直于斜面。
Moisture will cause the surface resistivity measurements to be lower than normal.
湿度将使表面电阻率的测量结果比正常情况低一些。
This is necessary because the loads are usually applied normal to the calibration fixture surface.
之所以有此需要，是因为所加载荷通常是垂直于校准装置平面的。
AIM: To study the effect of phacoemulsification in surface anesthesia on normal ocular surface.
目的：探讨表面麻醉下白内障超声乳化摘除术对正常眼表的影响。
This average is then applied relative to the surface normal at the current location.
然后，相对于当前位置上的曲面法向应用此平均值。
This average is then applied relative to the surface normal at the current location.
然后，相对于当前位置上的曲面法向应用此平均值。
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