There are three places on the planet that have the high energy physics equipment in order to make these, and these are the three places.

在地球上有三个地方,有高能物理设备,为了制造出这些元素，有三个地方。

麻省理工公开课 - 固态化学导论课程节选

And this exercise of being able to work In these three different modes, economic intuition, graphs, and kind of nerdy high school math is a lot of what we want to get you used to as Economic Majors, just to be able to translate easily between those.

这个练习可以用,三种不同的方法解决,即,经济直觉,图表,和一些讨厌的高中数学,希望经济学专业的同学能掌握这些方法,对于这些方法能够随手拈来

耶鲁公开课 - 博弈论课程节选

s But it just turns out that the 4 s is so low in energy that it actually surpasses the 3 d, because we know the 3 d is going to be pretty high in terms of the three shell, and the 4 s is going to be the lowest interms of the 4 shell, and it turns out that we need to fill up the 4 s 4s before we fill in the 3 d.

但是结果是,能量较低,4s是第四层最低的，因为我们知道3d在第三层,是非常高的，4s是第四层,最低的，结果是我们在填充3d之前,需要先填充。

麻省理工公开课 - 化学原理课程节选