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The main goals of the summit are to agree on targets to cut to greenhouse-gas emissions and to set up a mechanism to provide developing countries with the billions of dollars needed to cope with climate change.
VOA: standard.2009.12.17
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I'm thinking about a problem, I'm going to show you an example in a second, first thing I'm going to do is say, what is the thing that's going to change every time I run through the same set of code?
我要解决一个问题，我马上会让大家看一个例子，第一件我要做的事情就是,弄明白每次运行同样的指令集时,每次都会改变的东西是什么？
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But if you are so inclined whether for this problem set or any other throughout the term, you can change your mind week to week.
但是如果你倾向哪套题,那么你可以按周改变想法。
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And so the set of properties that describes system equilibrium doesn't change.
这些描述系统的属性,平衡是不变的。
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We have seen the rise of a whole set of threats that we're not prepared to deal with, from climate change to global epidemics.
我们发现危机重重,我们还没有应对的准备，从气候变化到全球范围内的流行病。
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When you go from one set of axes to another set of axes, the numbers change.
当你将一组坐标轴变换到另一组坐标轴时,坐标值会发生变化
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And if you have your calculator all set up as you love and you don't want to change it, then maybe you should just go and get an $8.00 scientific calculator that doesn't have any of the graphing functions, because you don't actually need them, so that's a better option for you, you can do that as well.
如果你的计算器里已经按照你的喜好编好了,而你又不想改动，那么或许你可以,去再买一个八美元的科学计算器,它没有任何绘图功能，因为实际上你也用不到这些，所以这对你来说是一个更好的选择，你也可以这样做。
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And so, if you rewind the tape and play it again over and over and over again, each time you set things up the very same way they must move or transform or change or end up in the very same state.
所以,如果你将一盘磁带,反反复复地播放,每次你播放的内容,从头到尾的起承转合一定是,绝对一致的
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So, let's change our graph where we now have this zero point set as the two individuals hydrogen atoms, and then we see that our h 2 molecule is at the negative of the dissociation energy, or the negative what that bond strength is.
那么让我们把曲线图中的零点能改到,两个分离的氢原子处，那我们就会看到,氢分子就是负的离解能，或者负的键的强度。
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