That means a vector that is at every point of the curve perpendicular to the curve and has length one.

也就是，曲线每一点上,垂直于曲线，模长为1的向量。

youdao

This blade has a gentle, sloping convex curve to the point versus the concave curve of the clip blade.

相对于回形刀刃的凹曲线而言，这种刀刃具有一条延伸到刀尖的、温和的凸斜率曲线。

youdao

A quadratic bezier curve has a start and an end point (blue dots) and just one control point (red dot) while a cubic bezier curve USES two control points.

它们都有一个起点一个终点图中的蓝点，但二次方贝塞尔曲线只有一个红色控制点点而三次方贝塞尔曲线有两个。

youdao

That concept isn't really compelling to the masses until one focuses on the "knee" of this exponential curve -- the point where the perpetual doubling of technological growth skyrockets and negates the linear models of progress that people like economists have relied on for so long.

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They will prevent the two monetary cures from inflicting that bad old J-curve bleeding of the patient to the point of death.

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