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The National Osteoporosis Foundation says a test called Dual-energy X-ray absorptiometry,or DXA, is the best test for osteoporosis.
VOA: special.2010.08.31
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So we can have, if we have the final quantum number m equal plus 1 or minus 1, we're dealing with a p x or a p y orbital.
所以如果我们有,磁量子数ｍ等于正负１,我们讨论的就是ｐｘ或者ｐｙ轨道。
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X Y Z It's more interestingly named an X or Y or Z.
你也可以把它命名为。
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"Deece," or D-I-X,led to "Dixie."
VOA: special.2009.08.02
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px We'll call it either pi 2 p x, 2py if we're combining the x orbitals, or pi 2 p y.
我们叫它π,如果是x轨道组合的话，或者π
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It's not like all the orthopedic injuries I've had where you go get an MRI or an X-ray and you get it fixed.
VOA: standard.2010.02.26
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Even if I was that guy in the X-Men or the Matrix or whatever it was, who could reason his way into making people do things.
就算我是X-Men或者尼奥,我能影响到别人的推理
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So, what we have found out so far, I'm purposely going from x to y because I want you to know that the unknown variable can be called an x or can be called a y.
到目前为止,我们有这些结论,我特地把x换成y,因为我想让你们明白,未知变量既可以写成x,也可以写成y
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This is saying, that's a class, true or sorry, an instance of a class, and I'm going to get the x value associated with it.
那么两个点是同一个点，我会返回，注意格式，这儿的意思是,它是一个类，噢对不起。
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And then, you start thinking, "Well, I could really start doing this if only X and if I had this person or if this technology existed or if this happened or this happened."
之后，你会开始思考，恩，只要某项条件成熟了，只要我认识这个人,或是如果这个技术存在,或是如果这个或那个发生了，我就能开始落实这个点子了“
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I think it becomes 30 degrees for the freezing of water and 22.5 x 4, which I don't know what it is, 90 100 or something -- no, it's 90 I think.
我想水的冰点,应该变成了30度,22。5，4，我不知道是多少，大概100左右--不，我想是。
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This is a chest x-ray that would be taken in your doctor's office, for example, or a radiologist's office.
这是一张胸部的X光片,人们会在医生的办公室,或放射科医生的办公室之类的地方见到它
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If n = 1, x/n can take on only two values: 0 or 1.
当n=1时,x/n的值只可能等于0和1
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Take many of you through graduation When you leave Yale, what do you want--like, "I had X sexual partners, " and that's what I wanted" ? Or your lifetime?
如果你们多数都毕业了,当你们离开耶鲁时想要什么，诸如，“我有过X个性伴侣，那就是我想要的“,在你这一生呢？
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So who the sender is, so maybe you could keep track of just who your most frequent correspondents are and if you keep seeing the same personfrom person X or person Y coming into your inbox and clearlyI like having a dialog with these people or have to for work, that might in fact bubble up in your inbox.
谁是发送者，你可能会保留最近跟你联系最频繁的人,如果你发现某某人频繁发送邮件给你,这说明你喜欢和这些人保持联系,可能因工作的原因必须保持联系,那么该邮件就有可能，上升到你邮件的最上方。
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And just as with variables, you should use some common sense, some style here, and the function's name should X Y communicate what it does, calling it X or Y or Z is generally not all that helpful.
就像变量，你使用一些常识，一些类型，和函数名需要,传达它所做的事情，把它叫做,或者Z通常是没有什么用处的。
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Y He's not returning A or B or temp, and definitely not X or Y; so he just did all of this work and yet that's it.
他不会返回A或B或temp，肯定也不是X或;,所以他刚才做了所有的工作，就是那样。
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And the pi star orbitals result from any time you have destructive py interference from 2 p orbitals that are either the p x or the p y.
星轨道是由于2p轨道的相消干涉,不管是px还是。
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Z So it would be incorrect to try to assign this to a variable X or Y or Z, because it doesn't actually give me anything back.
这个是错误的，来赋值这个给变量X或Y或,因为它的确没有返回什么给我。
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1 Similarly, if m is equal to either plus 1 or minus 1, py we would in turn call it the p y orbital, or the p x orbital.
类似的，如果m等于+1或，我们可以叫它，或者px轨道。
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And when I create a binding, x I'm taking a variable name, in this case x, stored somewhere in a table, and I'm creating a link or a pointer from that name to that value.
当我创建一个绑定的时候，我有一个变量的名字，在这个例子中是，存在一个表中的某处，然后创建一个连接,或者指针从这个名字指向目标值。
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It's like I've got ESP or I'm some character out of the X-Men, Is that what it's called? The X-Men right?
好像我有超能力或者我是X-Men,是叫X-Men吧
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I can either look at my flow chart, or I can look at the code. If I look at the flow chart, it says, I'm at this point. Look at ANS squared. Is it less than or equal to-- sorry, first of all, 0 ANS squared is 0, is it less than or equal to x, yes.
我可以看流程图也可以看我的代码,如果我看流程图的话，流程图这么说的，在这一点，看看ANS的平方,看是不是小于等于-对不起，首先，ANS的平方是。
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If I have three, I have 16 x 4 or 64 possible choices, way more than enough.
那如果是三个碱基一组,那就有16x4种,六十四种组合,那就足够了
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You can either think of it as an arrow and imagine the arrow, or you can reduce it to a pair of numbers, x and y.
你既可以用有向线段来表示,也可以用一组数字来表示,x 和 y
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So, fairly simple idea, who knows why we actually care what the values of X or Y are at least in this out of context.
看，非常简单吧，天晓得为啥我们关心x和y的值,在这里我们只是断章取义罢了。
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foo Well, if main has any local variables X or Y or temp or foo or bar, or whatever the case may be, those variables come next in memory.
好的，如果main函数有本地的变量X或Y或temp或,或bar，或者诸如此类的例子，这些变量在内存中紧随其后。
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That's it. Again, these other p dxy dyz - or the d x y, d y z, those are going to be those more complicated linear combinations, you don't need to worry about them.
同样，这些p轨道,或者，它们是一些,很复杂的线性组合，你们，不用管它。
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So we're going to call this the sigma 2 p x star, or if we're talking about the 2 p y orbitals we'll call this the pi 2 p x star, and the pi 2 p y star.
我们叫这个sigma2px星，或者如果我们说的是π2py轨道的话,我们叫这个2px星，这个π2py星。
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Now, unlike high school math or in algebra Z where you call things X and Y and Z, in programming, in computer science, you're actually dealing with humans where it's useful to have a variable name that's more descriptive than X and Y and Z.
不像高中数学或者代数中,称为X和Y和，在程序设计和计算机科学里，你实际上是在和人打交道,在这里有个描述性比xyz更强的,变量名称是很重要的。
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