The problem is not every vector field is a gradient.

问题是，不是所有向量场都是梯度。

youdao

He proposed a statistical tool, the vector autoregression (VAR), as a solution to this problem.

他提出了一个统计工具，向量自回归(VAR)，来解决这一问题。

youdao

However, the problem is that vector processing assumes that each and every instruction will be applied to all elements of the vector.

然而，问题是向量处理会假设每条指令都可以适用于向量的所有元素。

youdao