And we looked at the component of a vector field in the direction that was normal to the curve.

我们研究的是，向量场在曲线法向量方向的情况。

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This means that they can be vector based and, therefore, you can provide a common component that can be used at a variety of resolutions.

这意味着它们可以是基于矢量的，因此，您可以提供一个公共的组件，在各种不同的地方使用它。

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Only if the component vectors are on a straight line will the length of the vector for the sum be equal to the sum of the lengths of these components or to their difference.

只有当几个分矢量在一直线上，那么表示其和的矢量长度才会等于这些分量的长度和或它们的差。

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