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So we're just subtracting, in effect, zero, right, from the enthalpy of the product, but of course it's important have that established because the heat of formation is something you could measure, right?
所以从效果上说，我们只是，从生成物的焓中减去了零，但，是确立这一点很重要,因为生成热是,你能测量的东西，对吧？
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We're subtracting them from one 1 and they're less than one, so this is bigger than this.
用1减去他们,结果小于，所以它大于它。
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So if we're subtracting the interference term, what we have here now is destructive interference.
如果我们减去干涉项，我们得到的就是相消干涉。
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And the yardstick that we're at least doing our best to apply is one of measuring up the pleasure and subtracting the pain.
我们尽最大努力去应用的标准,是汇总快乐，再减去痛苦。
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Right? In other words I've got the stoichiometric coefficients in there and the values, and I'm subtracting the reactants from products -1652kJ/mol wind up with minus 1652 kilojoules per mole.
对吧？换句话说这里我用了化学,计量系数和生成热的值，从生成物中减去反应物,最后得到。
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You might think, well, that's just a matter of adding up the goodness of life and subtracting the badness of death and summing whatever it comes to.
你可能会想，不就是把生命的好处加起来,再减去死亡的坏处,然后相加得出一个结论么。
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And again, if we write out what all the terms are, we again have 1 s a squared plus 1 s b squared, but now what we're doing is we're actually subtracting the interference term.
同样，如果我们把所有的项都写出来，同样我们有1s平方加上1sb平方，先现在我们做的是,我们要减去干涉项。
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When we talk about anti-bonding, 1sb essentially we're taking 1 s a and now we're subtracting 1 s b, sigma1s and what we end up with again is sigma 1 s, and the important thing to remember is to write this star here.
当我们讨论反键时，本质上我们是用1sa减去，最后我们得到，记住这里有个星。
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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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