找一个可以把这个画成直线的方法。
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.
这将把直线的中心放在坐标0,0处。
上面讲的就是如何找到最合理直线的方法。
直线的斜率是多少？
一共是两条路线，一条是环型的，一条是直线的。
There are two lines, one that goes in a circle, the other that is straight.
这样，当我在旋转图形时，直线的中心将发生旋转。
That way, when I rotate the shape, the rotation occurs from the center of the line.
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.
可以通过调用edge类的方法查看和修改直线的属性。
You can read and modify the line's properties by calling methods of the Edge class.
所以马，不像其他走直线的棋子，它会给你出其不意的惊喜。
So the knight, far from going on a straight course, surprises you.
你会得到一条，永远低于直线的曲线，因为两边都是负偏移。
You're going to get a curve that's always below the straight line. Because we have the negative deviation on both sides.
他们都被放置在用户屏幕中间一条虚构垂直线的两端。
They are placed on both sides of an imaginary vertical line on the page which goes through the middle of the user's screen.
对于每条轴线，使用moveToAPI来设置开始绘制直线的起始点。
For each of these, use the moveTo API to set the point from which you will begin to draw a line.
一项是被研究对象用目测来确定一条直线的长度——此任务对美国人来说较合胃口。
In one, subjects eyeballed a line simply to estimate its length - a task that played to American strengths.
例如，length方法返回直线的长度，start返回起始点，end返回终点。
For example, the length method returns the line's length, start returns its starting point, and end returns its ending point.
他在这发现，你们也，可以很清楚的看到，不同金属直线的，斜率是相同的。
And what he found here, which is what you can see and we can all see pretty clearly, is the slope of all of these lines is the same regardless of what the type of metal is.
这幅图片从黄道平面的视角捕捉到地球、月球和太阳排成一条直线的瞬间画面。
This image captures a momentary line-up looking out along this fundamental plane of our solar system.
光，在日常生活经验中它是以直线的方式传播的，可是现在可以把它捕获在复杂的曲面上。
Which in everyday experience travels in straight beams, has been trapped on complex curved surfaces.
我的第一个错误是我并不真正了解精力管理，与时间管理不同，是一个循环过程而不是直线的。
My first mistake was that I didn't truly understand that energy management, unlike time management, is a cyclical process, not a linear one.
我的第一个错误是我并不真正了解精力管理，与时间管理不同，是一个循环过程而不是直线的。
My first mistake was that I didn’t truly understand that energymanagement, unlike time management, is a cyclical process, not a linearone.
在日常生活中，光是以直线的方式传播的，但是在复杂的曲面，光的传播被限制在表面附近。
LIGHT, which in everyday experience travels in straight beams, has been trapped on complex curved surfaces.
只要看看那条接近直线的时间-纵坐标图像和斜率明显变化的速度-时间图像，你就可以明白了。
You can tell by looking at the position graph (which shows an almost straight line) as well as the velocity graph where the slope clearly changes.
这就是为什么在只有垂直线的环境中长大的小猫和的大脑和那些生活在水平线环境中的猫的大脑有所不同。
That is why kittens raised so that they see only vertical lines have brains that look different from those raised in an environment with purely horizontal ones.
同样，亚洲人在完成更困难的任务时——在没有正方形比较的情况下估算直线的长度，注意力区域活动更剧烈。
In Asians, too, the attention areas lit up more during the harder task - estimating the line's length without comparing it to the square.
好，现在我们有了理想气体温度计，由此还可以引出理想气体定律，我们可以得到这条，插值出的直线的斜率。
Great. So now we have this ideal gas thermometer, and out of this ideal gas thermometer, also comes out the ideal gas law.
从图表中可以看出，不同性别的人在各种元素上的不同倾向性，比如字体颜色，对直线的使用以及喜好的颜色。
The graphic shows the different tendencies for each gender covering areas such as typeface colors, the use of straight lines and favorite colors.
热带地区繁衍着比北极地带多上数十倍的动植物物种，地理位置越趋向两极，生物的物种就会有直线的减少趋势。
The tropics boast more than 10 times as many species of animal and plant as the Arctic, with diversity decreasing steadily as you approach the poles.
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?
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?
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