Researchers say they have found a way to extend the storage life of a drug used to treat H.I.V.

VOA: special.2010.05.24

So, I just want to write a few examples down with a few values for delta u or delta H or delta S, and see whether we can get any clues from what we see.

我先写一些例子,例子包含一些内能，自由焓和熵的变化数值，然后看从中,我们能不能得到一些启示。

麻省理工公开课 - 热力学与动力学课程节选

So here are results for pathway A, right, for delta u zero delta H zero. I didn't actually explicitly write it or did I?

这是路径A的结果，△U是零,△H是零，我没有明确地写出来,是吧？让我们把它再写一遍？

麻省理工公开课 - 热力学与动力学课程节选

In Kenya,a project aims to educate girls about H.I.V.prevention while helping them stay in school during their monthly periods.

VOA: special.2009.03.16

The more important thing that I want you to notice when you're looking at this wave equation for a 1 s h atom, is the fact that if you look at the angular component of the wave function, you'll notice that it's a constant.

我要你们注意的,更重要的一点是,当你们看到,这个氢原子1s轨道方程的时候，如果你们看,波函数，的角向部分，你们会发现它是一个常数。

麻省理工公开课 - 化学原理课程节选

Also in Kenya, a video game is being tested as another way to teach young people to avoid H.I.V.

VOA: special.2009.03.16

That way,H.I.V.-infected women could have plenty of time to get the pouch from a health care provider early in their pregnancy.

VOA: special.2010.05.24

And a program in Peru sends text messages to patients with H.I.V., reminding them to take their medicines.

VOA: special.2010.05.03

A calf is a young cow. A young female cow, especially one that has not yet had a calf, is called a heifer: H-E-I-F-E-R.

VOA: special.2009.07.21

AIDS researchers say they still have much work to do on a vaccine against H.I.V.

VOA: special.2009.09.30

In addition,almost half a million people who were infected with tuberculosis and with H.I.V.also died.

VOA: special.2009.03.25

from mother to child. She noted a United Nations report that in two thousand eight about four hundred thirty thousand babies were born with H.I.V.

VOA: special.2010.05.24

The experts at N.I.H.say you may have to repeat this process a few times.

VOA: special.2010.03.31

Volunteers received vaccinations over a period of six months and were tested for H.I.V.

VOA: special.2009.09.30

In South Africa, a campaign of text messages about H.I.V.

VOA: special.2010.05.03