It's OK to use certain fundamental constants that come in a lot of calculators, so there's nothing we can do about that. That's OK.

当然允许使用,一些普通计算器里都有的基本常数，我们不会连这些都不让用，这是没问题的。

麻省理工公开课 - 化学原理课程节选

So it's important to write out the equation you use, you need to write out the constants that you use to fill in that equation.

因此重要的是写出你所用的公式，你需写出,你用在公式中的常数。

麻省理工公开课 - 化学原理课程节选