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The International Organization for Migration says most of Iraq's more than 1.5 million internally displaced people are caught in a vicious cycle of despair.
VOA: standard.2009.10.04
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That's when I have difficulty getting out of this downward, vicious cycle.
那时我将很难脱离这种下行，恶性的循环。
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So that's a virtuous cycle.
所以是个良性循环。
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Interrupting that cycle was a primary goal of President Obama's massive economic-stimulus package, which he championed almost immediately upon entering the White House.
VOA: standard.2009.07.02
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So now let's go around the cycle and just compare notes on what happens to the thermodynamic quantities as we do that.
现在让我们推导一下这个循环,比较一下这个过程中,热力学性质的变化。
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Skeptics argue,however, that rising temperatures and warmer oceans are part of a natural cycle and are not convinced the changes are a result of man's pollution.
VOA: standard.2009.05.03
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Each year it's dramatized by the cycle of the seasons, And at a certain time of the year it seems that The forces of darkness and chaos are prevailing but each spring, Once again, cosmic order and life return.
每年这冲突都由季节的轮回戏剧性地体现出来，仿佛是每年都有一个时期,弥散着黑暗和混乱的势力，可是每当春天来临，宇庙的秩序又恢复了。
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But if it is not, it's going to print out a message here saying, you screwed up, somewhat politely, and it's going to go back around. So it'll just cycle until I get something of the right type.
但是输入不是浮点数的话,我这里就会显示一个消息说，你搞砸了，该稍微有点礼貌吧？,然后我们继续执行循环,一直到得到正确类型的输入。
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It's the beginning of his Ring cycle and we're going to listen to this.
我们将要听的是开头部分。
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Again, what's the utility of the Born-Haber Cycle?
波恩哈伯循环的作用是什么？
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Some small subsets do but most of the cells in your brain don't proliferate and that's because they get trapped at one portion of the cell cycle.
除了很小一部分以外大部分脑细胞不增殖,这是因为,它们停滞于细胞周期的某个阶段
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That's the life cycle story.
这就是生命周期。
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So we're going to go through a thermodynamic cycle, and here's what I want to calculate when we do this.
那么我们要推导,一个热力学循环,这是这个过程中我要计算的东西。
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If we build an engine for a car or anything else, it almost always is going to have some key element that's operating in a cycle, otherwise it won't keep going, right.
如果我们为一辆汽车，或其他什么东西制造一台引擎,它总要有一些关键，要素来形成循环。
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And I wanted to do it a different way which is a little bit convoluted, but it introduces the idea of a thermodynamic cycle, and it's something that we're going to use a lot in the class.
现在我将用另一种,有些复杂的办法来推导这一关系，在这一过程中引入,我们今后会常接触到的,热力学循环的概念。
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All right, let's complete the cycle now, 3 the path number 3 here.
最后，来看路径。
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It's not a result that's specific to the one cycle that we put up.
这不是某一个,特定热机的结果。
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Here is the pitch in--of--a string an octave higher so you can see it this way. As you probably know, if you take a long string and pluck it, it's going to take that long string a long time to pass that sort of cycle, if you will, just one pass through that cycle.
这也是个音高,一个高八度的音弦,你可以这样这样看 你们可能知道,如果你拨动长弦,长弦要经过很长时间,才能完成一个震动周期,如果你想,可以尝试下
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OK, so let's look at the cycle we'll go through.
好，让我们来研究这个循环。
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So the way I've got things written here, q1 Heat's flowing from the hot reservoir to the engine that runs in a cycle.
我把这些都这些这里，是正的，q1，is，positive,热从高温的热源,传到循环工作的热机，对外做功。
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It gets produced in response to a signal so there's a binding of a ligand to a receptor, the enzyme that does this conversion is activated and more cycle AMP is released.
这类分子的产生是对信号做出的一种反应,当配体和受体结合时,催化这种转化过程的酶被激活,更多的cAMP释放出来
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So there is our set of individual processes that's going to constitute our cycle, right.
那么这就是组成这个,循环的一组反应过程。
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q2 So it's got q2, w and it's got a cycle w.
得到的热量是，有一个循环，功是。
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Now, if we go back to our Carnot cycle which is a set of reversible paths, it's useful to compare this to what happens in an irreversible case.
如果回到卡诺循环,它是由一系列可逆过程组成，我们将它,和不可逆过程的情况相比较。
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And the cycle it's going to undertake is called a Carnot cycle, and it works the following way: we're going to do pressure volume work.
它的循环过程,叫做卡诺循环，过程如下：,这是个压强体积系统。
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