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OK, then it says draw a single bond from each surrounding atom to the central atom, and subtract two valence electrons.
后将中心原子与其相邻原子之间,连上单键，然后减掉2个价电子。
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254 So, basically all we did was take 12 54, 22 subtract 12 32, and we got 22 electron volts.
基本上我们所要做的全部也就是用，减去，1232，这样就得到了。
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We cannot do anything about protons, they are buried in the nucleus, but we can add or subtract electrons.
我们不能改变质子，它们埋藏在原子核内，但是我们能够增加或减少电子。
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You've got to juggle the two equations, multiply that by 4, multiply that by 3, add and subtract and so on.
同时处理这两个方程,这个两边乘以4,另一个两边乘以3,将两方程相加或相减求出答案
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They subtract this from the purchase price of the house and then you've got the cash to go and buy another house.
他们从售房价格里减去这个贷款余额,然后你就可以得到现金去买另一个房子
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Obviously-- and that's a bad way of saying it, I said constant the previous time-- in the linear case, it's subtract by certain amount.
这么描述很不准确，我之前在，线性算法中也说了常数,它是每次减少固定的量。
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But all of you in this room probably remember what we technically call the base 10 system or decimal system because back in grade school or the like, you learned to count and add and subtract numbers by way of columns.
但是，在座的每一位可能都记得,这在小学的时候学的,以10为进制的系统或者十进制系统,通过数列方式学习数数和加减法。
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And against that we would then have to subtract the sum total of the negative experiences, all the failures and deceptions or what have you.
与此相对，我们必须,减掉消极经历的总和，所有的失败和受到的欺骗。
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This term is the same except we're going to subtract off Player iI's efforts squared: S2 squared.
表达式也是一样的,只不过我们要减掉S2的平方
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If instead we had a positive ion, a cation, what we would have to do is subtract 1.
如果我们有一个带正电的离子，一个正离子，那我们就需要再减去一个。
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And since we don't have to charge compensate, we can add or subtract neutrons at liberty.
因为我们没有电荷补偿，我们就可以随意地加上火减少中子。
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So to figure out bonding electrons, -- what we take is that number 18, which is our total number of electrons we need to fill valence shells, and we subtract it from our number of valence electrons, which is 10.
那么为了找出成键电子，我们将十八，也就是填满所有价壳层,所需要电子的总个数，减去我们所有的价电子的个数，也就是十。
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Then the deal is that when you sell the house they subtract -you've got to pay this.
那么当你售出房子后,他们会从中减去,这个余额,这就是你要付给他们的
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Add up all the pleasures, subtract all the pains.
把所有快乐加起来减去所有痛苦。
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You can't just add up all the pleasures and subtract the pains, or add up all the accomplishments and subtract the failures, or add up all the knowledge and subtract the ignorance and deception.
你不能只是把快乐加起来然后减去痛苦，或者仅是把成功相加再减去失败，或者把学问相加再减去蒙昧和欺骗。
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And then if we think about 3 s, 0 we want to start with 3, we subtract 1, again l is equal to 0, so minus and we have two radial nodes.
我们从3开始，减去，同样的l等于，所以减去0，我们有两个节点，这应该。
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And that's just to take 1 the principle quantum number l and subtract it by 1, and then also subtract from that your l quantum number.
主量子数,减去,再减去，量子数,你们可以对1s轨道来验证一下。
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All right, so the bonding order, you're correct, should be 2, if we subtract the number of bonding minus anti-bonding electrons and take that in 1/2.
好，你们是对的，键序为，如果我们用成键数,减去反键数除以2。
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Subtract that from one, 100 multiply it by 100 and you have something between zero and 100.
用一减去后面那部分，再整体乘以,你就能得到0-100间的一些数值。
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So, if we want to figure out the formal charge on the carbon, we need to take the number of valence electrons, so that's 4. We need to subtract the lone pair, what number is that? It's 2.
如果我们想算出碳原子的形式电荷，我们需要将价电子的个数，也就是四，减去孤对电子的个数，它是多少？是二。
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And if we talk about chlorine, and both of the chlorines are the same in this case, we start with a valence number of 7 for chlorine, and then we subtract 6, because it had 6 lone pair electrons around each of the chlorine atoms.
而如果我们讨论氯的话，在这个例子中两个氯的情况都是一样的，从七个价电子开始，然后减去六，因为每个氯原子周围,都有六个孤对电子。
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We add up the goods, subtract the bads-- whatever our favorite list is-- and we come to our best educated guess about the rival evaluations of not just lives as a whole, but chunks of lives.
我们把好事加起来减去坏事-,不管我们最喜欢哪些事-,我们不但可以据理推测,一生期间其他生活的价值，还能推测某段时间其他生活的价值。
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There you are at the pearly gates and you look back on your life and you could, in principle, add up all the pleasures, add up all the pains, subtract the pains from the pleasures and ask yourself, "How good a life did I have?
当你站在天堂门口回顾一生时,你可以，在原则上，累加所有快乐，累加所有痛苦，从快乐中减去痛苦然后问自己，“我的一生到底有多好？
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I put in .9958 for every dollar I got out, so my appreciation of my money is 1/.9958. Subtract that by $1, which is what I put in, and that's how much money I made as a fraction of a dollar.
我投入0.9958美元,得到1美元,我的资产增值为1/0.9958,减去1美元,那是我的投入,这就是每1美元,赚了多少钱
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You want to subtract off the value of a perpetuity that starts after 2T, six-month intervals, so this is the present value of the perpetuity that starts after 2T, six-month intervals.
所以就要从永续债券价格里减去,2T期以后,每六月一期券息的贴现值,这部分是永久债券从第2T期后,每半年一期券息的现值
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sb So in this case we would have 1 s a and 1 s b, and instead we would subtract one from the other, and what we would see is that instead of having additional, more wave function in the middle here, we've actually cancelled out the wave function and we end up with a node.
在这种情况下我们有1sa和，两者相减，我们可以看到不是在，中间有了额外更多的波函数，而是我们消掉了,波函数得到一个节点。
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pxa So what happens when we add a 2 p a and we subtract from it a 2 p x b, or the same with a 2 p y a subtracting a 2 p y b, is that we're actually going to cancel out the wave function in the center, so we now have 2 nodal planes.
当我们用,减去2pxb时，或者是2pya减去2pyb时，我们会消去,中间的波函数，所以现在我们有两个节面。
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