So, even if the speed is constant, that means, even if a length of the velocity vector stays the same, the velocity vector can still rotate.

因此即使速率不变，也就是说速度矢量的的大小不变，但它的方向可以做旋转。

youdao

For instance, it's also the square of the Euclidean norm on R2, the length of a two-dimensional vector, a part of the triangle inequality, and quite a bit more.

例如，R 2 的平方、二维向量的长度、三角不等式等都存在勾股定理。

youdao

Consider a vector of five strings; you want to sort them on the basis of increasing string length.

请考虑一个包含5个字符串的向量；希望按字符串长度的升序排序。

youdao

It's good to have a vector pointing in the radial direction of length one.

所以引入这么一个模长为 1,方向沿圆心向外辐射的矢量作用很大

耶鲁公开课 - 基础物理课程节选

The 0 vector is a vector of no length.

零矢量是没有模长的矢量

耶鲁公开课 - 基础物理课程节选

If you drop the arrow, it's the usual convention, if you're talking about the length of the vector A.

如果你把箭头去掉,就表示矢量 A 的模长,这是约定俗成的

耶鲁公开课 - 基础物理课程节选