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About seventy-six centimeters of dry snow equals the water in two and one-half centimeters of rain.
VOA: special.2011.01.11
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That energy will be absorbed by the hydrogen atom, n=1 the electron will rise from n equals one n=2 to n equals two.
这能量将会被氢原子吸收，这个电子会从,上升到。
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There are some relative, the notion that the energy gap between n equals one and n equals two is greater than that for n equals two to n equals three. That is correctly represented.
还有很多与之相关的内容，比如说这个观点，第一能量级和第二能量级,之间的能量差要大于第二和第三能量级间的,能量差，而这已经被正确地表示出来了。
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So here we have 3 minus l equals 0, because it's an s orbital, minus 1, so we have two radial nodes here.
这里我们有３减去ｌ等于０,因为这是ｓ轨道，减去１,我们有两个径向节点。
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Two plus one equaled three before there were people; two plus one equals three now; two plus one will always equal three.
在人类出现之前,二加一就等于三,二加一现在等于三,并将永远等于三
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pV=RT p plus a over v bar squared times v bar minus b equals r t. All right if you take a equal to zero, these are the two parameters, a and b. If you take those two equal to zero you have p v is equal to r t.
我们就回到,也就是理想气体,状态方程,下面我们来看看,这个方程。
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I bought a number of two-period bonds such that the value of my purchase exactly equals the proceeds that I get from shorting the one period bond, so I've made a zero wealth transaction.
我买入了一定数量的两年期债券,其成本刚好等于我卖空,一单位一年期债券获得的资金,我做的是零成本交易
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And I could call these others n equals two, n These are harmonics.
我将其他的n等于，等于3，n，equals，three。,这些是和声。
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And, if we go to n equals two, this would be the l shell.
而当n等于2时，也就是L层。
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We go to n equals two for a fixed value of Z.
我们对于一个给定的Z值，让n等于。
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And then, if we go to n equals two, what happens?
然后，如果我们让n等于2，会是什么情况？
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It's as though you try-- try getting upset about the fact that two plus two equals four.
这就像你在尝试-,为二加二等于四而烦恼。
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So he curses existence, curses God at having made him so impotent that he can't change the fact that two plus two equals four.
所以他诅咒生存，诅咒上帝让他如此无能,无能到无法改变二加二等于四的事实。
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Try feeling upset at your powerlessness to change the fact that two plus two equals four.
尝试为你无力,改变二加二等于四的事实而痛苦。
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And so he imagines that God, as omnipotent, could've made two plus two equals five.
所以他猜想，万能的上帝可以让二加二等于五。
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Suppose the E incident is greater than the energy in the transition going from ground state n=2 What will happen?
假设入射能量远远大于,从基态向,转变的能量。，to，n，equals，two。,那会发生什么？
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We are able to talk about the fact that two plus one equals three, but it's not as though we ever come across numbers-- number three itself--anywhere in the empirical world.
我们可与去探讨,二加一等于三的这个事实,但是我们不可能有一天真的碰到数字,在现实世界中碰到个叫"数字三"的东西
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We all do believe something makes it true that two plus one equals three, but it's not the fact that empirical objects-- We don't do empirical experiments to see whether two plus one equals three.
我们都相信有些东西,使2加1等于3是正确的,但这不是说现实的东西,我们不会在现实中做实验,去看看二加一是不是等于三
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Whatever the n number is, with the exception of helium, helium is the oddity because there's only two elements in n equals one shell.
无论n是多少，除了氦之外，氦是个特例,因为只有两个元素,在n为1的这一层。
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And if that is the energy to go from n equals one n=2 this is the amount of energy that has to be left as kinetic energy of the electron.
如果这个能量是从n=1到,然后，to，n，equals，two，then,这些能量,会作为电子的动能,被消耗掉。
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So there are two electron configurations in the n equals one shell, if we follow according to the selection rules that we spelled out last day.
如果根据上次课,我们阐明的原子光谱选择定则，我们就会知道在n等于1的那一层,有两种电子图像构型。
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If you look at the ground state in two different systems -If you look at the ground state which is n equals one, think about this, if I increase the proton charge, the Coulombic force of attraction is greater.
如果你观察两个不同系统的基态,当你观察n，等于1的基态时，试想一下，如果我增加质子电荷，相互吸引的库仑力就会更大。
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