So we have four choices in terms of initial and final energy levels, and also what it means - in terms of the electron -- whether it's gaining energy or whether it's going to be emitting energy?

我们有这四个选项,各有不同的初始能量和末能量,它都是按照电子来说的,不管是失去能量还是得到能量？

麻省理工公开课 - 化学原理课程节选

There will be an option when you pull up the tab for this particular course if you go to the course website and that will link you right to the course website.

当你们点击课程标签时,有个登陆这门课网站的选项,那个链接可以转到课程网页

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

I just wanted to get her on the subway and she, too, she did mention I want a round trip, she wants to be able to come back from Park Street Station so where is the option that just says one way or round trip?

我只想让她乘上地铁，她也是，她提到她想要一个环形旅行，她想,从Park，Street地铁站返回，但是哪里有一个选项,来说明是一个单线的还是环线的？

哈佛公开课 - 计算机科学课程节选

p All right, then what? 2 p. After that? 3 s. Next? 3 p, that gives us five different options, five different orbitals, five different energies right there.

好，然后呢？2，p，继续？3，s，下一个？,我们有五个不同的选项，五个不同的轨道，五个不同的能量在这。

麻省理工公开课 - 化学原理课程节选