In two thousand seven she established the Kay Yow/WBCA Cancer Fund in partnership with the V Foundation for Cancer Research.
VOA: special.2009.03.29
We'll then look at the quantity, internal energy, which we define through the first law, and we think of it as a function of two variables T and V.
接下来我们考虑内能,这是由热力学第一定律定义的物理量,我们把它看作T和V的函数。
We have two main cafeterias, the Ratty and the V-Dub, which are on opposite sides, South and North.
我们主要有两个食堂,一个叫Ratty,一个叫V-Dub,两个食堂一个在南边,一个在北边。
Two studies showed ways in which anti-H.I.V.drugs could permit infected women to breastfeed their newborns with less risk of passing the virus to them.
VOA: special.2009.07.29
v The weight, w, and v, these are the two vectors we've seen here.
重量是w和价值,这是我们看过的向量的两个值。
It says H.I.V.-related deaths appear to have reached their highest point in two thousand four.
VOA: special.2009.12.02
And our job is to find out what is the mathematical description of this path, this line in p-V's case that connects these two point.
我们的任务,就是找出,描述这条曲线的方程。
It says H.I.V.-related deaths appear to have reached their highest level in two thousand four.
VOA: special.2009.12.08
So, in fact, as Thucydides tells us beautifully in Book V, when the two armies actually hit each other they have already made a slight turn to the right.
因此,事实上,像修西得底斯在第五册里优雅描述的那样,当两军真正开始接触时,他们已经略微向右转了
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
If you think of two towns down here, Brive,b-r-i-v-e,famous for its rugby, and Tulle,t-u-l-l-e,which is a capital.
如果你可以想起来这儿的两个城镇,布瑞福,b-r-i-v-e,以英式橄榄球运动而负有盛名,图勒,t-u-l-l-e,是一个省的首府
About two-thirds of the people with H.I.V.
VOA: special.2009.12.02
So what are these two other numbers, x0 and v0 and x-not and v-not?
那么这另外两个量是多少,x0 和 v0
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。
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。
So we're going to start with a mole of gas, V at some pressure, some volume, T temperature and some mole so V, doing it per mole, and we're going to do two paths here.
假设有1摩尔气体,具有一点的压强p,体积,温度,我们将让它,经过两条不同的路径。
In this case, V = /P. Have two quantities and the number of moles gives you another property. You don't need to know the volume. All you need to know is the pressure and temperature and the number of moles to get the volume.
以及气体的摩尔数,就可以得到第三个量,知道压强,温度和气体的,摩尔数就可以推导出气体的体积,这称为状态方程,它建立了状态函数之间的联系。
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