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- And we can think about why -- essentially we have fluorine and now we're adding another electron. So you can picture that fluorine is going to get larger in this case And that would be true for all of the negatively charged ions.
我们可以想一想这是为什么-,本质上来讲我们现在给氟原子加上了,另外一个电子,因此大家可以想象在这种情况下氟将变大,而且这对于其它负离子也是成立的。
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So you got like a surfboard-shaped board and put wheels on it, so they could ride it.
找一块冲浪板形状的板子，加上轮子，就可以滑了。
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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 again, I put in numcalls this num calls, which you can ignore.
所以再一次我会加上,这个，你们可以忽略这个。
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But one problem that this also caused is if you're going to put all the books, the documents that you think are scripture,between two covers with the scrolls,you can take one out and put another in.
但这引起了一个问题,如果你要为，那些被认为是圣典的书籍加上封面,如果是卷轴你可以随意取舍。
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Okay? So those are the basic note values normally with a duple division but we can superimpose triple by using a dot and the absence of sound.
清楚了吗,这些就是基本的音符值,一般是双倍形式分配,但我们可以把它添加为三倍形式的,通过加上附点当然还有休止符
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But I can add to this some number, like 96, that'll still have the property that if you take two derivatives, you're going to get the same acceleration.
但是我可以在后面加上某个数,比如96,经过两次求导你仍会得到,同样的加速度
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So, remember, boron was one of those exceptions to our Lewis structure rules where it was perfectly happy not having a full octet.
所以我们可以加上3个氢原子,对于BH3，这是个稳定结构,记住，B是Lewis结构的一个特例。
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So the extra points get added either way.
所以额外分数两边都可以加上。
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So we already know that. So now we can write CpdT or differential dH as Cp dT plus dH/dp, pdp constant temperature, dp.
我们已经知道了这个，所以我们现在,可以写出H的微分式：dH等于，加上恒温时的偏H偏。
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and follow it with the question that you want to find out about.
在后面加上你想要了解的问题就可以了。
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Also, you could use "Would you" with a "like" right after to soften the question even further.
当然，你也可以在“Would you”后面加上一个“like”，因为你可以用这个疑问句使你提出的各种问题变得更温和。
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You're going to get a chance to explore them, and you'll see not only are there the standard numerics for strings, there are things like length or plus or other things you can do with them.
以后你们还会学到更多，你会学到字符串,不仅仅能运用标准数值运算，你还可以对他们求长度,或者加上其他的东西。
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They tend to be just triads whereas in classical music we can have a triad but we can also add a seventh note with one,three,five,seven,nine,eleven, that kind of thing.
流行乐一般只用三和弦，但是古典乐可以用三和弦,也可以在上面加上七音，一，三，五，七，九，十一，诸如此类的。
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And that in the case of constant volume, U in this case that's my delta u, and then I'll H add my little delta n term to get delta H.
这是在等体情形下，此时的到的是Δ,然后我可以加上Δn的项来得到Δ
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It can be x plus some change in x plus j times y plus a change in y.
可以写成 x 加上 x 方向的变化量,再加上 y 加上 y 方向的变化量
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OK, so for a constant volume process, du we can write du, partial derivative of dT u with respect to T at constant V, dT, dv plus partial derivative of u at constant V, dV.
好，对于一个恒定体积的过程，我们可以写出,等于偏u偏T，V不变，加上偏u偏V，T不变。
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It adds fifty percent or a half to that and that means instead of two quarter notes that we now have three and we can do the same thing to any one of these other values here and that's how we get our triple relationships.
加上了百分之五十或者说一半的原音符值,这意味着除了有两个四分音符,我们现在有三个了,我们也可以在其他这些音符值后加上附点,这就是我们如何做到三倍形式的安排的
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You can add something else to the answer without invalidating it, and that is anything with one power of t in it, because if you take one derivative it'll survive, but if you take two derivatives, it'll get wiped out.
你可以往答案后面加上其它东西,而且不影响结果,也就是任何t的一次项,因为你求一次导数之后它还在,但如果你求两次导数,这一项就不存在了
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Now, I've not given you any other example besides the displacement vector, but at the moment, we'll define a vector to be any object which looks like some multiple of i plus some multiple of j.
除了位移矢量之外,我就不再举其他的例子了,但是现在我们要定义一个矢量,可以表示为 i 的倍数加上 j 的倍数
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