And, in terms of direction, it will be normal to the surface.

对于方向，则是曲面的法方向。

youdao

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。

youdao

The orientation of CO molecule normal to the surface toward which the carbon end faces is the most favorable one, as we expected.

而且CO分子的取向是以C原子朝向活性位置为最佳方向，这与我们所期望的相一致。

youdao

Storm surges have the potential to be dangerous because they involve a great upwelling of a stretch of ocean - intense low pressure at the heart of a storm literally tugs the sea surface above its normal level to create a massive bulge.

BBC: Legacy of Britain's great flood

Now he can congratulate himself that, on the surface at least, things are back to normal.

ECONOMIST: Eisner fights on

But Dr Dial wanted to be sure, so he compared the accomplishments of normal partridges with birds that had their wing feathers clipped to half their normal surface area, and to even less fortunate fowl whose main flight feathers were entirely plucked.

ECONOMIST: Birds that don't fly may be using their wings to run uphill