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A lot has happened since the exuberant optimism of the political spirit that we see in a tract like Areopagitica.
弥尔顿在《论出版自由》中发表了极为乐观的政治思想之后,政治形势发生了很大变化。
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I would say absolutely. And I would say even I could notice over the past four years I feel and there is a different tenor.
我答案是肯定的，我想说,甚至我都能感受到过去四年里,学校氛围发生的变化。
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As soon as you allow anything to mix, like you might if you want to do any chemistry, entropy changes.
只要你允许物质混合，就像你做任何化学实验的时候要做的，熵就会发生变化。
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That can happen but that's abnormal, but changes in maybe the chemistry of the backbone that holds the nucleotides together.
这可能发生的,但属于非正常的变化,而是改变诸如维持核苷酸序列的,主链的化学结构
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sort of takes the cyclicality out of earnings and you can see over history how that multiple has varied.
一定程度上在收益上避免了周期性的,而且你可以看到随着历史的进程,这个倍数发生了多大的变化。
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And so, there's been a profound change in public presentations, public views, on race but what about implicit views? This gets more complicated.
所以人们在公众中表达他们对种族的,刻板印象发生了巨大的变化,但私下的刻板印象呢？这就复杂了。
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The next slide shows the farm, same farm and its surroundings in 1998, so you can see that a lot has happened here.
接下来这张幻灯片展示的,是1998年的这个农场的周边,你可以看到发生了很大的变化
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And that is that the energy levels themselves change with electron occupancy.
就是能级本身,也会随着电子的排布发生变化。
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We want to figure out if the harmony is changing, and if it is changing whether it's changing at a regular or irregular rate.
一是判断和声是否发生了变化，二是如果发生了变化，和声的变化频率是规则还是不规则的。
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If we had this sort of progressive all-radical alteration, not just minimal alteration, but radical alterations of my memory, my beliefs, my desires, my tastes.
如果我们持续经历剧烈变化，不只是最小的变化，而是自己的记忆，信仰，渴望，品味都发生剧烈变化。
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The Greek way of looking at things requires a change from the characteristic way of knowing things before the Greeks, that is to say, the use of faith, poetry, and intuition.
希腊人观察事物的方式需要改变,这和之前人们通过信仰,诗歌和直觉来了解事物的方式,发生了很大的变化
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You see, you can keep the operations the same whether or not you pay a dividend, if choosing not to pay a dividend means substituting stock repurchase for dividend.
不管你是否支付股利,你公司的运转都不会发生变化,如果不发放股利,那就意味着,以股票回购代替股利分配
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Once the gases are mixed, there's not going to be any further net change in the system.
一旦气体混合,这个系统就不会发生任何净的变化。
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The boundary is impervious to transfer of heat like a thermos Anything that happens inside of the thermos is an adiabatic change because the thermos has no connection in terms of energy to the outside world.
边界不能传递热量,像热水瓶一样,热水瓶里发生的任何事,都是绝热变化,因为热水瓶与外部世界,没有能量方面的联系。
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There's a lag period where if I was just looking for antibodies nothing happens for a while.
这中间存在一段迟滞期,如果只过一会就进行观察,抗体的数量不会发生变化
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But that's changing, and more and more people do want to know the story of its food.
但这一点正在发生变化,越来越多的人想知道食物背后的故事
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Here is what we calculate to tell whether it happens spontaneously.
这就是我们所需要计算的物理量,它能够告诉我们变化是否会自发发生。
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You've irreversibly changed that substance because you've changed the structure of all the proteins inside.
蛋白质的结构发生不可逆的变化,因为蛋白质内部的全部结构都改变了
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This is one of the kinds of differences that develop that happens during development and cells somehow know where they are within this developing asymmetrical organism.
这是发育过程中,发生的一种变化,而且细胞似乎知道它们,在这个非对称发育生物体中的位置
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Think about how grossly things have changed starting in those earlier times.
想想随着时间流逝,情况发生了多大的变化
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That changes a cell and here's some examples of it.
有些事例就可以说明细胞发生的变化
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And since we are not expecting the mass of the particle to change, what we really are saying is the uncertainty in its velocity times the uncertainty in its position is greater than the ratio of the Planck constant divided by 2 pi.
因为我们不期望,粒子质量发生变化，我们说的是,它速度的不确定度,乘以它位置的不确定度,比普朗克常量,除以2除以圆周率要大。
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As it does that it changes the volume of the heart and gives the - creates the pressure that moves blood around your body, so it has that muscular system.
这使心脏的体积发生变化,产生了足以使血液流遍全身的压力,这就是心脏中有肌肉系统的原因
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So your tastes in music evolve over thousands of years.
你对音乐的品味随时间发生变化。
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But it's all different degrees of terrible, if you will, because so many people in the population share that biological vulnerability and when the environment changes, we have the problems.
只要愿意,这造成的恐慌程度是不同的,因为在人群中有很多这样的群体,他们都有这种生物易损性,当环境发生变化时,就会出现问题
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Now we'll go back further than 10,000 years to talk about the history of food, but in those--but at 10,000 years ago several very important changes happened that have shaped to a great extent what our modern relationship with food is.
让我们回到一万多年前,来讨论饮食史,但是,一万年前,发生了一些很重要的变化,这些变化很大程度上塑造了,现代人类与食物的关系
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Fat is not all that much different, but one thing that's happened is the type of fat has changed a lot, and so people are eating less fat from plant sources and more fat from animals sources That's where the saturated fat comes in and high saturated fat intake is not a good thing.
脂肪摄入量相差无几,然而脂肪的种类却发生了很大变化,人们越来越少从植物中摄取脂肪,而更多是从肉类食物中获得,肉类食物中含有饱和脂肪酸,而过多地摄入饱和脂肪酸是有害的
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The amount of food available is striking, I mean in the period of time I was--since I was a child there are a lot of changes that have occurred, and I mentioned some of this in the last class-- but when I was a child you didn't have rows and rows of food at a drugstore.
现有粮食的数量是惊人的,当我还是小孩的时候,身边就发生了很多变化,我上节课曾提到过一些,在我小的时候,药店里还没有满货架的食品
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