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Yellow or brown areas shaped like the letter V on leaves may be a sign of black rot infection.
VOA: special.2009.03.03
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So if I take p times V to the gamma, anywhere on the path, it's going to be equal to the same relation This is going to be true for any point on the path.
结果都，将等于，初态点的,只要在这条路径上。
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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。
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On March thirteenth, Clyde Tombaugh and V.M Slipher announced the discovery of a new planet.
VOA: special.2010.07.11
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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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AIDS researchers say they still have much work to do on a vaccine against H.I.V.
VOA: special.2009.09.30
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And,so,Henri V could capitalize on that because there were lots of people that would be very happy to see him come back because of their belief.
所以它会被亨利五世利用,因为有很多人,看到他为他们的信仰回归而感到高兴
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On Monday,Washington,D.C., health officials reported shocking information about H.I.V.
VOA: special.2009.03.20
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Peter's new fleet, we'll talk about his new fleet, which he oversaw and, in a very minor way, helped build himself, sails down the Don River in 1698 and takes the Turkish port of Azov, A-Z-O-V, on the Sea of Azov.
我们接下来讲讲彼得的新舰队,尽管影响不大,但他亲自监督,并且参与组建了这个舰队,舰队于1698年沿顿河顺流而下,直取土耳其的亚速港,在亚速海上
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I learn off the radio waves of 98.7 Kiss F.M.salsa/disco jams, that come from a Sony, bought even though I need a coat, even though I'm behind on my payments for the Trinitron Remote Control Color T.V.
VOA: special.2009.04.27
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As long as we understand that, we can do this cancellation and this says on the left-hand side the change in the quantity v square over 2 is a times the change in the quantity x.
只要我们明白这一点,我们就可以这样做简化,在等号左边,v^/2的变化量,为a乘以x的变化量
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So we've got a I chord built on the first degree of the scale, a V chord built on the fifth degree of the scale, a IV chord built on the--a IV chord built on the fourth degree, and a VI chord built on the sixth degree.
这样我们就有了建立在第一音级上的I和弦，第五音级上的V和弦，第四音级上的IV和弦，以及第六音级上的VI和弦。
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This depends on the path. It tells you right here the path is constant pressure. These don't depend on the path, right. V doesn't care how you v get there. u doesn't care how you get there.
这由变化的具体路径决定,这个小脚标表明过程是恒压的,这些量都与具体路径无关,即不管是通过什么路径使得体积变化为Δ
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And if I draw a diagram on a T-V diagram of T-V V1 I'm starting with some V1 here.
画出过程的,图，what，I’m，doing，here，初态是。
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So if you're going to turn the crank v on the math correctly, you're going Cv to have to change this p into a V somehow.
所以如果哟啊正确地推导,我们需要把这个p变成,因为从数学上说这不是。
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It's the pressure the external world is applying on this poor system here.
V是气体初态和,末态的体积之差。
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V Minus p2, V2. Minus p delta V. So the total work is the work from the left hand side plus the work on the right hand side, p1 V1- p2 V2 which is p1 V1 minus p2 V2.
负p2V2【w=-p2v2】，即负pΔ,所以全部的功就是,左边的功加上右边的功，等于。
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So you know your cycle, you know, you could have a whole complicated sequence on a p v diagram of steps going back.
因此，对某一的循环过程，可以在pV图上画出,一系列很复杂的小步骤。
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The typical vector is called V or A or B something with an arrow on it.
表示矢量时一般在,字母 V,A 或者 B,上面加个箭头
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So on the p-V diagram, then, V1 V2 p1 p2 there's a V1 here a V2 here, a p1 here a p2 here.
在p-V图上，这是。
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If it's going in a circle, you will say from now on, that it, indeed, has an acceleration, even though no one's stepping on the accelerator, of amount v^2 over R.
如果它在一个圆周上运动,你会说从现在起它其实有加速度,即使没有人去踩油门,加速度大小为 v^2 / R
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du/dV under constant temperature was equal to zero for an ideal gas. And by analogy, we expect the same thing to be true here, because enthalpy and energy have all this analogy going on here. So let's look at an ideal gas.
偏U偏V在恒温下等于零,可以类比，我们希望在这里也一样，因为焓和能量有很强的类比性，让我们看看理想气体,【理想气体】
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