实际上，直线的参数方程总是这个样子的。
In fact, parametric equations of lines always look like that.
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.
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.
我们主要还是关注，参数方程的运用，主要是一维的，比如直线、曲线等。
So, we have mostly focused on the use of parametric equations just for one dimensional objects, lines, and curves.
当然也有另一种方法，就是用参数方程表示这两条直线，用两条直线的方向向量作外积，从而得到切平面的法向量。
Another way to do it, of course, would provide actually parametric equations of these lines, get vectors along them and then take the cross-product to get the normal vector to the plane.
我们还学过怎样理解直线方程，它们有些特性，因为我们是从参数方程角度理解。
Ok, we've also seen how to look at equations of lines, and those were of a slightly different nature because we've been doing them as parametric equations.
该方程的因变量与自变量均为试验数据的函数，直线常数中含有待求弥散参数。
The dependent and independent variables in those equations are the functions of test data, and the linear constants include the parameters to be estimated.
探讨在利用对应直线进行摄像机外部参数校正的过程中，如何快速简便地确定齐次方程组系数矩阵秩的问题。
In camera calibration with line correspondences, it is important to determine the rank of the coefficient matrix of the equation system in a quick and efficient way.
同时，对具有参数方程形式表示的非圆曲线进行了等间距直线逼近的节点误差分析。
While there is the analysis of node tolerance with parameter equation on approaching along a straight line with equal step.
同时，对具有参数方程形式表示的非圆曲线进行了等间距直线逼近的节点误差分析。
While there is the analysis of node tolerance with parameter equation on approaching along a straight line with equal step.
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