R So let's get rid of R in this expression here.

利用这个式子，我们就可以消去。

麻省理工公开课 - 热力学与动力学课程节选

We know it's going around in a circle because if I find the length of this vector, which is the x-square part, plus the y-square part, I just get r square at all times, because sine square plus cosine square is one.

我们之所以知道它做圆周运动,是因为我求出了这个矢量的模长,也就是 x 的平方加上 y 的平方,我就得到了它在任意时刻的模长平方,因为正弦平方加余弦平方始终等于1

耶鲁公开课 - 基础物理课程节选

If you get them backwards, logr you will integrate one over r and will get log r.

如果你逆推的话，对1/r积分得到。

麻省理工公开课 - 固态化学导论课程节选

Because most newspapers won't advertise NC-17 films, studios do almost anything to ensure that their movies get an R rating.

CNN: Taking aim at show biz

Nothing happens except that you get a 1099-R form declaring the entire account as income.

FORBES: Conversion Time

R. officers get a handle on these issues so they can advise to their CEOs.

FORBES: The Path to Prosperity Lies Through H.R.--That's Right, H.R.