In fact, it's interesting to note that the first calculation on the impact of CO2 on climate was done in the late 1800's by Arrhenius.

很有趣地,是阿列纽斯在19世纪末,第一个做了的关于二氧化碳,对气候的影响的计算。

麻省理工公开课 - 热力学与动力学课程节选

But we know that just by this calculation, that we don't have equal sharing.

但是如果通过仅仅计算，我们得不到相同程度的电子共享。

麻省理工公开课 - 固态化学导论课程节选

Also, what's the energy per photon of this red laser pointer, and then it's also worth trying a calculation dealing with intensity. So let's also try calculating the numbers of photons that would be emitted by this laser pointer, if, for example, we were to use it for 60 seconds and this were a one milliwatt laser.

同样，红色激光笔的,每个光子能量是多少，这也值得用处理强度的方法计算一下,让我们也计算一下,有多少光子会从这个激光笔射出，举个例子，如果我们使用它持续60秒,这里会有一毫瓦的激光。

麻省理工公开课 - 化学原理课程节选