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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
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Delta v is positive in this direction here, the work is negative. So work on the system is positive. Work done by the system is negative.
功是负的，总而言之,外界对系统做功的符号为正。
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A It tells me that the partial of A with respect to T at constant V is minus S. Right?
他告诉我们,在恒定体积下对温度的微分等于负S，对吗？
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She believes the chimp virus infection is not quite as damaging as H.I.V.is in humans.
VOA: special.2009.09.08
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v is obtained by taking derivative of this expression.
可以通过这个式子求导得到
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She says the pouch is an important tool for preventing the spread of H.I.V.
VOA: special.2010.05.24
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French universities are named very poetically, Paris I,II,III,IV,V,VI, all the way through XIV, which is a real hole, or XIII is probably the worst.
巴黎的大学命名得都很有诗意,巴黎第一大学,第二大学,第三大学,以此类推,一直到第十四大学,这是真实存在的,第十三大学可能是最差的
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The bottom of the scion is cut in the shape of the letter V.
VOA: special.2010.05.18
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This is his picture of Charles V at a battle in Germany in 1648.
这是一张查理五世,在1648年德国战争中的画
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Evidence that the universe is expanding was first discovered at Lowell Observatory by V.M.Slipher.
VOA: special.2010.07.11
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So here's a program called Arg V, this is fancy speak for argument Vector, a list of arguments for the left or right.
这里有一个叫做ArgV的程序，这个设想讲述了,参数矢量，从左到右的一列参数。
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When clothing is wet or stretched, however, it lets more U-V rays pass through.
VOA: special.2010.07.06
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Why is that? Because w and v are constant.
为什么？因为w和v是常数。
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He is probably best known for his multi-colored Rolls Royce Phantom V limousine.
VOA: special.2011.01.28
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pV=RT p plus a over v bar squared times v bar minus b equals r t. All right if you take a equal to zero, these are the two parameters, a and b. If you take those two equal to zero you have p v is equal to r t.
我们就回到,也就是理想气体,状态方程,下面我们来看看,这个方程。
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The new formulation is known as B.O.P.V., or bivalent oral polio vaccine.
VOA: special.2010.01.18
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So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.
也就是当活塞,压缩气体的时候，做的功是正的，按照这一规定,我们需要在这里，加上一个负号，这是习惯规定。
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During the summer, the most dangerous period for U-V rays in the United States mainland is between the hours of ten in the morning and four in the afternoon.
VOA: special.2010.07.06
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Well, we already know what dA/dT at constant V is.
我们知道恒定体积下的。
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H.I.V.is the virus that causes AIDS.
VOA: special.2009.03.16
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Delta v is going to be negative. w is going to be negative. Sorry, I got it backwards again.
这样就对外界做了功,这时候ΔV是正的。
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H.I.V.is short for the human immunodeficiency virus.
VOA: special.2009.12.08
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Then, you can then understand that v is what b is, which we write as v0.
然后你现在就可以知道,v就是系数b,我们记作v0
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What some call the V-word - Vietnam is increasingly heard in the growing debate over U.S.involvement in Afghanistan.
VOA: standard.2009.09.09
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D-A-V-I-D So when you get a string like D-A-V-I-D, what's really happening is inside your computer's RAM is going a byte where there's some zeros and ones.
譬如你有这么一个字符串，而在你电脑的RAM里将会变成,一个个由0和1组成的字节。
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"The U.S.data should remind us that this recovery is not likely to be V-shaped It seems to me that we are going to see rising unemployment for a long time yet,"
VOA: standard.2009.08.05
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So I can make a quantity that I'll call V bar, which is the molar volume, the volume of one mole of a component in my system, and that becomes an intensive quantity.
所以我可以定义，一个叫做一横的量，这是摩尔体积系统中,一摩尔某种组分的体积，它就变成了。
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"His name is John Barovetto, B-a-r-o-v-e-t-t-o.
VOA: standard.2010.05.31
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V+dV And this is going to be here V plus dV.
这里是。
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And then V minus the excluded volume term is equal to RT. Two parameters, this is the attraction between two atoms or molecules in the gas phase.
以及V减去一个排斥项,等于RT，两个参数，这是气体状态下两个原子,或者分子之间的吸引力。
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