When it was his turn to speak, Mr.Obama said old grievances in the hemisphere should be set aside, replaced by a renewed commitment to expand prosperity, security and freedom in the Americas, with all nations working as equals to confront common challenges.

VOA: standard.2009.04.17

We are able to talk about the fact that two plus one equals three, but it's not as though we ever come across numbers-- number three itself--anywhere in the empirical world.

我们可与去探讨,二加一等于三的这个事实,但是我们不可能有一天真的碰到数字,在现实世界中碰到个叫"数字三"的东西

耶鲁公开课 - 死亡课程节选

- There are a few equations that you need to memorize -- those are the very simple -- very, very simple equations, such as e equals h times nu -- hopefully you don't have to sit down and try to memorize that, hopefully we all know that already.

只有几个公式是需要记住的-,它们都非常简单，非常非常简单，比如，E，等于，h，乘以，ν,希望大家不需要再专门去背了，希望我们已经都记住了。

麻省理工公开课 - 化学原理课程节选

And if that is the energy to go from n equals one n=2 this is the amount of energy that has to be left as kinetic energy of the electron.

如果这个能量是从n=1到,然后，to，n，equals，two，then,这些能量,会作为电子的动能,被消耗掉。

麻省理工公开课 - 固态化学导论课程节选

So as I tried to say on the board, we can have n equals 1, 1/2 but since we can't have n equals 1/2, we actually can't have a binding energy that's anywhere in between these levels that are indicated here. And that's a really important point for something that comes out of solving the Schrodinger equation is this quantization of energy levels.

我在这要说的是，我们可以让n等于，但不能让n等于,我们不能得到在这些标出来的,能级之间的结合能，能级的量子化,是从解薛定谔方程中,得到的很重要的一点。

麻省理工公开课 - 化学原理课程节选