这都是根据题目要求而定的，有一个问题是，找出向量的分量就足够了吗？，还是说我们需要解出一条直线的方程？

It depends what the problem is asking the question is, is it enough to find the components of a vector or do we have to find the equation of a line?

youdao

我们马上就要学习直线的参数方程。

OK, so we are going to learn about parametric equations of lines.

youdao

我希望在这明白,参数方程是考虑直线的一个很好办法。

So, I hope you've seen here that parametric equations are a great way to think about lines.

youdao

So it doesn't really matter, but that's actually the equation of that line.

这个并不是极其重要,但这是该直线的方程

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