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The Doppler effect explains changes in the length of light waves or sound waves as they move toward you or away from you.
VOA: special.2009.04.29
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This is the notion that technology comes along which changes the game, changes the whole way in which you are doing business.
技术颠覆是指技术出现,改变了游戏，完全改变了,教育的方式。
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But then you start seeing the results and you start seeing how your body changes and you start, you know,
但是接着你就开始看到成果，你开始看到你身体的变化，你就开始，嗯，
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Running,walking or playing sports causes physical changes that make you feel better.
VOA: special.2009.03.24
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And you already saw last time there was this relationship between the temperature and volume changes along an adiabatic path.
是条绝热路径，而上次你已经看到,沿着绝热路径温度和体积,的变化有这个关系。
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Knowing what your skin looks like will help you recognize any changes.
VOA: special.2010.07.06
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What you see is that the radius changes with atomic number for constant electron number.
对于等电子数的粒子，离子半径随着,原子数的变化而变化。
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Or whether you take a very hard line against them to try to force changes coming in from below within the government.
VOA: standard.2009.08.14
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You make not small changes in their chemistry but big changes in their chemistry.
它们的化学性质,就会发生巨大的改变
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How do you do? Next weekmy schedule changes, so I can...
VOA: standard.other
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So add up all the changes or what you mean by integral.
将全部变化量加在一起,或者做积分
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What do you think of the changes in New York over the past few years?
你怎么看待纽约过去几年的变化？
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Pass to the left bank and the scene changes so suddenly that you think yourself on the other side of the world.
而河左岸则完全是另一番景象,让人怀疑自己到了世界的另一头
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Then you could also think about whether there are changes that could be made to improve diet.
然后,你也可以想想是能否做些改变,来改善食谱
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In both movies, Magnificent Amberson and Citizen Kane, that sort of tragedy that changes the past. Now you have the reality which is sort of bleaker.
在两部电影中，《安巴逊家族》和,《公民凯恩》，都有种悲剧的概念,改变了过去，现在你觉得,现实有点黯淡。
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And let's work--we'll hear that again, but as you can see and then hold on that and then the changes came a little bit faster and faster.
我们开始吧，然后就可以再次听到了，不过就像大家可以看到，然后继续保持到,再开始有变化，变得越来越快。
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We're trying to understand exactly what changes in your brain when you learn and how those changes persist over time to support memory. And one thing that we know which helps explain why some things are easier to remember than other is that learning is not a unitary process.
我们一直都想查明，学习的时候，大脑到底发生了什么变化，这些变化是如何长时间控制记忆的,我们都知道，学习的过程不是一元化的,这就是为什么有的东西好记，有的东西难记。
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There're also changes of what you can teach, extends what you can teach, because you can get to concept which are really quite sophisticated that you will never teach it at the introductory level, because the math is the least that you can make it quantitatively, because you have a visualization that shows physically what's going on.
同时这也能改变,教学内容，你能教授的程度，因为你可以定义,那些通常很难的,你在入门阶段都不会遇到的,抽象阶段，因为数学是你最不能,用定量手段来解决的，因为你有一个直观过程,知道什么正在进行。
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I heard that Brooklyn is changing these days. Can you tell us about the changes?
我听说现在布鲁克林正在改变。你能跟我讲讲那些变化吗？
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Going to the Upper West Side? You know, it changes.
去上西区吗？它在改变。
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How many changes of the constituent parts can you ? have and still be the same hunk of stuff?
要保持是同一辆车,最多可以换多少部件？
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The mortgage payment was decided when you took out the mortgage, so that never changes; they than figure out what your mortgage balance is.
每月偿还额是一开始确定的,因此不变,这样就能算出当前的贷款余额
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You don't want to make those changes.
你不该改变变量的类型。
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What I really want to do is just give an example of what happens when you throw the thing, the material into a calorimeter and see how much the temperature changes.
我想做的是给出当,你把这些东西，这些材料扔进，量热计时会发生什么,看看温度会变化多少。
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How many moles of gas are there in each case, in reactants and products? If that changes, of course you know that the pressure in there is going to change at constant volume if the amount of gas in there is changing.
在反应物和生成物中，各有多少摩尔的气体？,如果它发生了变化,当然在等体条件下，如果气体的总量,发生了变化，压强也会发生变化。
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If you have an isobaric you're going to have to calculate where the energy changes, and that's a calculation that's likely on the homework and very like on an exam as well, too.
在等压过程中,我们需要计算能量的变化，我们在作业,和考试中,就会遇到这类问题。
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You need a substance and then that substance has to have a property that changes depending on the heat flow, i.e., depending on whether it's sensing that it's the same temperature or different temperature than something else.
你需要某种物质,它的某种性质,随着热量的流动而改变，也就是说,依赖于它是否感觉到它,与其他的物体处于相同的温度。
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You know how pressure changes with temperature at constant volume if you know the equation of state.
如果你知道状态方程,知道在体积恒定的时压强如何随着温度变化。
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Now these quantities were useful because you could relate them. The slope of changes, with respect to volume or temperature of the energy with respect to quantities that you understood, that you could measure.
去得到这些量,这些量很有用，而且你们已经知道了，怎么把它们相互联系起来,像这种比例形式的量，能量比上温度或体,或其它你们懂的可以测量量。
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Some of the challenges that you see here I mentioned before, so there are problems with drought, with pests, with temperature changes and the like.
我之前提到的,你们所见的这些挑战,如干旱问题,虫害问题以及温度变化之类的
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