self y Notice what I also do here, I create self dot y, give it a value, and then, oh cool, I can also set up what's the radius and angle for this point, by just doing a little bit of work.

我创建了，然后给它赋值，然后，噢太酷了，通过做一点额外的工作,就可以得到点的半径和角度了，好，实际上如果。

youdao

R And the track has a radius R, and at this moment in time the angle equals theta, and here is the object.

轨道半径是，在这个时刻,角度等于θ,这是物体。

youdao

Let this be the angle d theta so it moves in a short amount of time over an angle d theta dS and the arc here is dS, R and the radius is R.

这是角度dθ,它运动了一会儿,运动过角度dθ,弧度是，半径是。

youdao

Once I've got that, you notice I can now define a polar point, same way. Notice I've now solved one of my problems, which is, in each one of these cases here, I'm creating both x y and radius angle values inside of there.

你们注意到我现在可以，定义一个极坐标点了，以同样的方式,请注意到现在，我已经解决了我的问题之一了，也就是，在这些例子中的每一个,我在里面都创建了x，y值。

麻省理工公开课 - 计算机科学及编程导论课程节选

Sorry, said that wrong, p1 radius 1 and angle 2, 2 radians is a little bit more than pi half.

而是半径和角度的表示，在这个例子中点，并不对应这个点,它实际上对应的是。

麻省理工公开课 - 计算机科学及编程导论课程节选

If its in Cartesian form I'll pass in an x and y and compute what a radius and angle is.

来得到的这个点,我都可以得到这个点的,全部的这种信息。

麻省理工公开课 - 计算机科学及编程导论课程节选

It was revealed that the radius and contact angle of the legs mainly accounted for the large supporting force, ensuring that the robotic water strider not only stood but also walked on the water surface.

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