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And realize too, as we say on this home page here, by default, we anonomize you when you log into this bulletin board, whereby, you're all logged in as quote unquote students.
并且认识到，像我们说的这个主页，默认情况下，当你登陆这个电子公告牌，我们禁止你们，都匿名学生登陆。
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And I wanted to show that common knowledge is not such an obvious a concept, as I've made it seem on the board.
我想让大家明白,共同知识并不是像我写在黑板上的,是一个想当然的概念
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So as I tried to say on the board, we can have n equals 1, 1/2 but since we can't have n equals 1/2, we actually can't have a binding energy that's anywhere in between these levels that are indicated here. And that's a really important point for something that comes out of solving the Schrodinger equation is this quantization of energy levels.
我在这要说的是，我们可以让n等于，但不能让n等于,我们不能得到在这些标出来的,能级之间的结合能，能级的量子化,是从解薛定谔方程中,得到的很重要的一点。
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So I want to go back again, now we're considering the line on the board as being flavor in beer, or location in a town, and I want to go back to politics now and go back to the interpretation we started with, so that left and right will end up being left-wing politics versus right-wing politics.
所以我想返回去,现在我们将黑板上的线看成,啤酒的口味或城市的位置,我现在再回去讨论政治,回去解释我们最初,把线的左边和右边,看成左派和右派的原因
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Well one reason I want to go back is you'll notice I've been putting up these lines on the board and when we visited elections on the second day, we said that you could think of that line on the board, as being not just left wing, right wing politics but also some dimension of products.
原因之一是我想你们将注意到,我在黑板上画了一条线,当我学习第二天学习的选举时,我们讲过你们可以想象黑板上有条线,不仅是左派和右派的政治家,还可以是某种产品特性
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So if we do this and we form the molecule ammonia, let's switch to a clicker question, and have you tell me what the bond angle - is going to be in ammonia -- HNH Actually, let me draw it on the board as you look -- actually, can you put the class notes on, since you don't actually have your notes to refer to.
如果这样做的话，我们就可以形成氨分子，让我们来做一个课堂练习,你们告诉我氨分子中的键角是多少-,键角，the，h，n，h，bond，angle。,实际上让我在黑板上画出它来，这样你们可以看到实际上-,你能把课堂讲义放出来吗，因为你们没有讲义可以参考。
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