Here is Stevie Wonder with his nineteen sixty-five hit single "Up-Tight (Everything's Alright)."

VOA: special.2009.10.19

So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.

比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。

麻省理工公开课 - 化学原理课程节选

Where, you know, you might have a single family that is using up 2 or 3 stories of the same apartment.

一个家庭也许会用上同一幢公寓的二三层楼。

上东区的房子 - SpeakingMax英语口语达人

And Alan Lomax had somevery compelling and really engaging stories to tell about actually painting himself up in blackface so that he could go into black communities, so that some of the whites wouldn't single him out and beat him up or whatever."

VOA: special.2010.01.18

I want to point out that the zero energy is defined as when you have a naked proton -- where the electron has popped out -- that's what we've defined as zero energy up to this point when we're talking about single atoms.

我想指出，这里零点能的定义,是当我们只有一个裸露的质子,而没有电子时-,到目前为止对零点能一直采用这样的定义,当我们在讨论单个原子时。

麻省理工公开课 - 化学原理课程节选

Sherrill Mosee was raised by a single mother who was forced to give up her dream of going to college.

VOA: standard.2009.12.04

See, up until now I have been talking about gas phase, single atoms, all this stuff.

看，只到现在我们已经讨论了气相，单原子，这些东西。

麻省理工公开课 - 固态化学导论课程节选

he picks up the pace on the first single from Never Going Back, with "Mid-Life Chrysler."

VOA: standard.2009.08.04

The DNA molecule here has been spread apart, opening up two single stranded DNA's which have complementary base sequences because they were double stranded DNA.

这里DNA分子被分开,形成两条单链DNA,这两条单链碱基序列互补,因为它们是由双链DNA解旋形成的

耶鲁公开课 - 生物医学工程探索课程节选

So "The Back-Up Plan" is to become a single mother with the help of modern science.

VOA: standard.2010.04.30

But actually there is a little bit of an energy cost into doubling up into a single orbital, because, of course, it takes energy when you create more electron repulsion, that's not something we want to do, but we have to do it here, and it turns out that that effect predominates over, again, the energy that we gain by increasing the atomic number by one.

但实际上，在一个轨道上放两个电子,确实会亏损一点能量，因为，当你加入更多电子，引起更大的排斥能,这显然会消耗能量，这不是我们想要做的，但是在这种情况下我们不得不做，结果这一影响，超过了增加一个,原子序数所得到的能量。

麻省理工公开课 - 化学原理课程节选

You have a single beam coming in, and you end up with rings.

单个光束进来，以光圈的形式出去。

麻省理工公开课 - 固态化学导论课程节选