In other new research, a study has found that circumcision does not decrease the risk that H.I.V.positive men will infect women.

VOA: special.2009.07.29

z So what we end up seeing is 34 that the z effective is equal to positive 1 . 3 4.

看到有效的,等于+1。

麻省理工公开课 - 化学原理课程节选

I'm going to say, quite to the contrary, the positive charge is concentrated at the center in a tiny, tiny, tiny volume.

我要说的是，完全相反，正电荷集中在中心,在一个非常非常小的体积内。

麻省理工公开课 - 固态化学导论课程节选

"I can say that,anecdotally, virtually all the teachers noticed immediately much more alertness in class, definitely more positive mood.

VOA: special.2010.10.07

dT/dp is mu JT. So for a real gas like air, this is a positive number. It's not zero.

所以对于像空气这样的真实气体，这是一个正数，不等于零。

麻省理工公开课 - 热力学与动力学课程节选

Information in a biological passport can help catch athletes who use banned drugs but find ways to avoid testing positive for them.

VOA: special.2011.04.12

I think it's also the struggle of a generation trying to enrich the public square with positive conversation about religion.

我认为这也是我们这一代人的努力,我们试图通过积极地谈论宗教,来丰富社会生活。

普林斯顿公开课 - 人性课程节选

In the north London neighborhood of Haringey, some young people are using their energy to do positive things.

VOA: special.2011.08.13

So, for example, for the chlorine case, we would say that the electron affinity for chlorine is actually positive 349 kilojoules per mole.

比如，以氯为例，我们可以说氯的电子亲和能,应该等于正的，349，千焦每摩尔。

麻省理工公开课 - 化学原理课程节选

Research has linked participation in sports to positive effects like better self-image, fewer teen pregnancies and higher grades.

VOA: special.2010.03.04

If it is, in fact, positive, then we're going to go in here, but now notice what we're doing here.

如果这个数实际上是个正数，那么我们就到,这里面来，但是请注意我们在这做了什么。

麻省理工公开课 - 计算机科学及编程导论课程节选

The singer said the testing shows that she is,in her words, borderline positive for the disease.

VOA: special.2010.06.15

Or if you want negative numbers, between negative 2 billion and positive 2 billion, but it's a finite range.

或者你想储存一个负数，就必须位于负20亿到,正20亿之间，是个有限的范围。

哈佛公开课 - 计算机科学课程节选

Awadi is a Senegalese musician who created the band called Positive Black Soul in nineteen eighty-nine.

VOA: special.2009.10.14

On the positive side,when we cultivate these things, it also helps us deal much better with the negative when dead arises.

在积极的一方，当我们注重培养这些情感因素，就会助于我们更好地处理,消极因素。

哈佛公开课 - 幸福课课程节选

Earlier studies have shown a positive effect of moderate drinking, especially of wine,on heart health.

VOA: special.2009.09.08

Well, when she was made to look attractive they were delighted when she gave them positive feedback about themselves.

当她打扮得很入时时,他们会非常高兴,如果这个女人给自己积极回应。

耶鲁公开课 - 心理学导论课程节选

"It is a positive sign because it is more commitment from the government.

VOA: special.2011.05.03

On the other hand, there were positive effects and those were added up on the other side of the ledger.

但另一方面，也有正效应,它们被记在账目的另一侧。

耶鲁公开课 - 公正课程节选

Justin says he wants to influence young people in a positive way.

VOA: special.2010.02.26

Now you have this situation where you have a droplet that is net negative or perhaps net positive.

现在的情况是那些液滴,可能是净负电，也可能是净正电。

麻省理工公开课 - 固态化学导论课程节选

And that if we want a positive earth for future generations, we all need to make commitments to be change agents so that we don't destruct our natural resources."

VOA: special.2010.01.21

No, we call that work positive work. All right, so that means we need to put a negative sign right here, by convention.

历史上有过不同的习惯，这里我们规定,如果环境对系统做功。

麻省理工公开课 - 热力学与动力学课程节选

Other presidents who were not terribly popular in their first year and had lots of controversies served two full terms and went out of office in a reasonably positive way."

VOA: special.2010.01.23

And, we're going to look at what happens as the chloride ion moves from infinity in towards the positive ion.

然后我们要看一下,当氯离子从无限远处逐渐靠近,这个正离子会发生什么。

麻省理工公开课 - 固态化学导论课程节选

Kami is known as the first HIV positive puppet.

VOA: special.2009.11.27

He could divide all of that by the absolute value of the charge of the positive particle, all over the mass of the positive particle.

他可以把这整个,除以正电粒子的,电荷绝对值除以，正电粒子的质量。

麻省理工公开课 - 化学原理课程节选

His message was positive instead of angry.

VOA: special.2010.05.16

And the mission of the positive psychology center is to promote research, training, education and dissemination of positive psychology.

积极心理学中心的使命,是推广研究，培训，教育和传播积极心理学。

哈佛公开课 - 幸福课课程节选

So, when we get really close together, granted, there is a net positive negative charge with a Coulombic force of attraction.

当它们真正离得很近时，假设有一个带正负电的电荷,带有库仑引力。

麻省理工公开课 - 固态化学导论课程节选