The reason is that, as mentioned earlier, Scheme will rename pi and e so they don't conflict with other names in enclosing or nested scopes.

原因在于 Scheme 会对 pi 和 e 进行重命名，使它们不会与包含或嵌入宏的范围中的其他名称冲突。

youdao

Pi So as we've written it, we've got Pi of Ei exp is proportional to e to the minus Ei over kT.

就像我们写的一样，我们得到,正比于。

youdao

F(electromotiveforce) of synchronous motor is the most important interference, the general PI(proportion integration)current regulator does not retrain the effect of E.

分析了影响同步电动机矢量控制电流控制环动态特性的主要因素，指出同步电动机反电动势是其中最重要的干扰因素。

youdao

And we can simplify this expression as saying negative e squared over 4 pi, epsilon nought r squared. Epsilon nought is a constant, it's something you might see in physics as well.

也会遇到它,在这里，你可以就把它,理解为一个转换系数,我们需要做的。

麻省理工公开课 - 化学原理课程节选

e The charge on the anion times minus e, so there is the minus e squared, 0R0 and divided by 4 pi epsilon zero r naught, because now I am evaluating this function at r naught, one minus one over n where n is the Born exponent.

阴离子的电荷乘以，因此会有-e的频繁，除以4πε,因为现在我用r圈评估这个函数，1-1/n，n是波恩指数。

麻省理工公开课 - 固态化学导论课程节选

I know the energy in this first pair would equal -e^2 That is just going to equal minus e squared over 4 pi epsilon zero r naught.

我们明白第一对的能量将会等于,等于,/4πε0，R圈。

麻省理工公开课 - 固态化学导论课程节选

Erickson also used the digits of pi (as well as the constant e) as the basis for the melody of his Pi Symphony, which was performed by the Omaha Symphony Orchestra Chamber group and by Ruse Philharmonic of Bulgaria last year.

CNN: STORY HIGHLIGHTS

When I was a teenager I saw a website suggesting pi could be a song, with one as middle C, two as D, three as E, etc.

CNN: On Pi Day, finding strength in numbers