• 1. tangent vector field: 切向量场
• 2. field of tangent vector: 切向量场

• 1.That is how we reformulated it. That means we take our curve and we figure out at each point how big the tangent component I guess I should probably take the same vector field as before.
  这是另一种形式，它意味着,要求出每点处向量在切向量方向的分量,我还是用之前那个向量场吧。
  dict.yoduao.com
• 2.And, in some cases, for example, if you know that the vector field is tangent to the curve or if a dot product is constant or things like that then that might actually give you a very easy answer.
  例如，在某些情况下，如果已知向量场与曲线相切，或者内积是一个常数等等，那么结果将会很简单。
  dict.yoduao.com
• 3.If you remember what we did several times, well, along the circle that vector field now is tangent to the circle.
  我们做过若干次了，沿着圆，向量场与圆相切。
  dict.yoduao.com

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