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There will need to be some organizing structures or frameworks or standard bodies that exist to coordinate that.
需要组织结构,框架或者标准,来协调这些网站。
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He needs to know about the structures of the molecules, because if the structure is wrong it's not going to work.
他想要让它们成键，他需要知道分子结构，因为如果结构不对。
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The semantics was what caused the problem, because the operator was expecting a particular kind of structure there.
引起问题的是语义，因为运算符需要的是,一种特定种类的数据结构。
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And, I know I need to come up with four symmetric equi-length bonds, and let's just see, let's draw the structure here.
我想我们需要,4个对称的等长的键，让我们画出CH4的结构。
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I think that as organizations grow, a lot of the issues and structure that's put in place is put there because a comfort level breaks down and people communicating freely in a way that they can when they're friends.
随着企业规模的扩大，会产生许多问题,需要某种组织结构,因为那种缓和的关系被打破,人们可以自由交谈,就像好友一般。
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So we've got the firms, they're the players, I know what their strategies are, I know a little bit about the structure of the market, and I still need to tell you what payoffs are.
我们有了公司,作为参与人,我知道它们的策略是什么,对市场的结构也有一些了解,我还需要告诉你们收益是什么
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Now the bases, and you don't need to memorize the structures of these I'm going - I'm describing the whole molecule to you in its molecular detail and then we're going to simplify it down to a version that we can talk about more easily.
现在讲碱基,你不需要记住这些结构,我将给你们详述整个分子,的结构细节,然后我们把它简化为一个模板,使我们更容易讨论
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So realize the support structure is now in place and in progress so do just let us know at help@cs50.net if you have questions that can't be addressed during office hours.
所以请意识到支撑结构已经出来了，并且正在进行,如果需要帮助，如果在课堂时间有任何不懂的问题,请在help@cs50，net上面给我,留言。
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What about the fact that-- We said there's a family of arguments, all of which have the general structure, inference to the best explanation, you need souls in order to explain feature F. Plug in a different feature F and you get a new argument.
这个事实怎么样,我们说过有一大类观点,它们有一些共同的结构,有关于这个最佳解释的推论,需要用灵魂的概念,来解释功能特征F,代入一个不同的,功能特征就会得到一个新的论点
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In terms of picking a Lewis structure that's going to be the lowest energy, what you want to do is put the atom with the lowest ionization energy in the center of your atom.
为了挑选一个具有,最低能量的路易斯结构，你需要把电离能最低的原子,放在最当中的位置。
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That means that we need 12 minus 8, 8 or 4 bonding electrons in our structure.
这意味着在这个结构里，我们需要12减去,等于4个成键电子。
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And you can do this any time if you have Lewis structures that you're choosing between.
而每当你遇到需要从几个可能的,路易斯结构中选择的情况。
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It's easy to write the skeletal structure, because it's all oxygen, we don't have to worry about what's going to go in the middle.
画它的骨架结构很容易，因为它们都是氧原子，我们不需要担心哪个原子在中间的问题。
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So, we can also get into a case where we have similar values in terms of absolute values of formal charge between two different molecules we're deciding between in their Lewis structures.
我们还可能遇到另外一种情况,那就是在我们需要进行,选择的两种路易斯结构中,形式电荷具有相似的绝对值。
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You won't always draw out every single possibility that you have to start with.
你都可以这样做,大家并不需要每次都把所有可能的结构都写出来。
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So, in terms of finishing our Lewis structure, we're actually not done yet here, even though we have full octets, and we've used up all of our valence electrons, and the reason is because it's c n minus, so we need to make sure that that's reflected in our Lewis structure, so let's put it in brackets here, and put a minus 1.
那么，根据我们的路易斯结构的完成情况，我们实际上还没有全部完成，尽管我们有了填满的“八隅体“,而且用完了所有的价电子，原因就是因为这是一个负离子，我们需要确保我们的路易斯结构能反映出这一点，所以让我们给它加个括号，再加个负一。
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So that means that we don't have to worry about things like wave functions when we're talking about Lewis structures, but because they're so simple to use and because they so often predict the electron configuration of molecules accurately, we end up using them all the time in chemistry, so it's very valuable to know how to draw them correctly and to know how to work with them.
因此这也就意味着我们在讨论路易斯结构的时候,不需要担心波函数之类的东西，但是由于路易斯结构不仅简单易用,而且用它来预测分子的电子排布,经常可以得到非常精确的结果，结果我们在化学中一直都在用它，因此知道如何正确地画出并运用,路易斯结构是非常有价值的。
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So, these are the different ways that we can actually go ahead and use formal charge when we're choosing between different types of Lewis structures.
那么，这些就是在我们需要在,不同的路易斯结构之间做选择的时候,我们如何用形式电荷来进行判断的各种方法。
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So your TA might take a minute, so be patient with them if they see your structure and they say oh, no, no, no, no that's wrong, that's terrible, and they don't immediately know why.
因此助教可能需要一点时间，如果他们看到你画的路易斯结构以后说,噢，不，不，不，不，这是错的，错得离谱，而他们却不能立刻说出错在哪。
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And resonance is the idea that sometimes one single Lewis structure does not adequately describe the electron configuration around a given molecule, so instead you need to draw two different Lewis structures to describe that more appropriately.
而所谓共振态,就是有时候一个路易斯结构不足以,完整描述一个给定分子的电子排布，因此这时你需要同时画出两个,不同的路易斯结构来描述它,这样会更恰当。
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But we could, for example, look at a case where we have several different structures that look pretty good, and the one we want to determine as being the lowest energy structure is the one in which the absolute values of the formal charges are going to be lower, so essentially that they have less charge separation.
但是我们可能，比如，遇到一种情况,有好几个候选的路易斯结构看起来都挺好的，这时候我们就需要,通过比较哪个形式电荷的绝对值更低,来决定哪个结构的能量更低，本质上这个结构中分开的电荷更少。
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So if you haven't clicked in yet, or if you want to change your answer, keep in mind that you might need to jot down, - for example, a Lewis structure before you can answer this question.
如果你还没有点答案，或者你想改变你的答案，记住你也许需要在回答问题前写点东西，比如画一画Lewis结构,来得到最终。
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We don't need to really talk about all the molecular detail in order to completely describe a DNA or an RNA molecule because these structures repeat themselves.
我们在完整的描述一个DNA或RNA时,不需要说明,分子上的每一个细节,因为它们的结构都是重复的
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All right, so this is the same procedure that we're going to go through, regardless of what kind of Lewis structure we're going to draw.
好的，这就是我们画路易斯结构,所需要完成的步骤，不管什么样的路易斯结构都要这样做。
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And an important thing to remember when we talk about resonance hybrids is that the structure it's not 1/2 the time this structure, and 1/2 of the time this structure, it's actually some combination or some average between the two structures.
而当我们讨论共振杂化的时候,有一件重要的事情需要牢记,那就是这种结构并不是,一半时间处于这种结构的状态，而另外一半时间又变成了这种结构的状态，它实际上是两种结构在,一定程度上的组合或者平均。
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It's always a good first approximation, because you need to start somewhere in terms of drawing Lewis structures, but then if you go and figure out the formal charge and you just have lots of charge separation or very high charges, like a plus 2 and a minus 2 and a minus 1 all different places in the atom, what it should tell you is maybe there's a better structure.
它总是一个好的第一近似，因为在画路易斯结构的时候,你总需要一个起点，但是如果你在算出形式电荷之后,发现有很多电荷分开了,或者说有很高的电荷，比如有一个正二，一个负二，还有一个负一1,在原子的各个地方，这应该就是在告诉你,或许还有一个更好的路易斯结构。
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And also I wanted to mention in terms of checking your Lewis structures, regardless of what they are, you should always go back and I had 10, and then count 2, 4, 6, 8, 10, because you always need to make sure you have the same number of valence electrons that you calculated in your actual structure.
我还想提一点关于检查,你的路易斯结构的建议，不管它们是什么，你总是应该回去检查一下,我有十个，然后数一数，二，四，六，八，十个，因为你总是需要确保实际价电子的数量,与你在结构中算出的数量相等。
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you can look on your notes, C it also says structure a, b, and c on your notes, so you didn't need to have just memorized that slide.
大家可以看你们的讲义，讲义上也把它们叫做结构，A，B，和，因此大家不需要去记那张幻灯片。
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