And then, if we have time at the end, we'll introduce one last topic, which is isoelectronic atoms and ions.
最后,如果有时间的话,我们将再介绍最后一个主题:,等电子原子与离子。
And now, if I'm touching mouse pointer, we saw that Boolean expression before, play sound meow, wait a couple of seconds, and then just keep checking.
现在,如果我们碰下鼠标指针,起初我们看到一个布尔表达式,播放猫叫的声音,等几秒钟,然后如刚才那样做检测。
So, selenium 2 minus is what's going to be isoelectronic, because if you add two electrons to selenium, you'll get the same electron configuration that you have for krypton here.
负二价的硒离子将是等电子的,因为如果你给硒原子加上两个电子,你会得到,和氪原子相同的电子排布。
And if we wish to continue this analogy, and I certainly do, between the poet Milton and the virgin Lady, we can see that this is a release that John Milton the poet has been waiting some time for.
如果我们希望继续这个弥尔顿的诗与小姐贞操的类比,我肯定会,我们可以看到,这是弥尔顿的诗等了很久的一种解脱。
If you knew your way around in the funhouse like your own bedroom, you could wait until a girl came along and then slip away without ever getting caught, even if her boyfriend was right with her.
如果你在开心馆中跟自己在寝室里一样熟悉门道,你可以等一个姑娘前来,事后溜之大吉,绝不会被人抓住,即使她男朋友就在旁边。
How many moles of gas are there in each case, in reactants and products? If that changes, of course you know that the pressure in there is going to change at constant volume if the amount of gas in there is changing.
在反应物和生成物中,各有多少摩尔的气体?,如果它发生了变化,当然在等体条件下,如果气体的总量,发生了变化,压强也会发生变化。
If I look for, say, minus 1, you might go, gee, wait a minute, if I was just doing linear search, I would've known right away that minus one wasn't in this list, because it's sorted and it's smaller than the first elements.
如果我要查找-1,你可能要怒了,呵呵,等一等,如果我用的是线性查找,我不会知道-1不在这个列表中,但是列表是排好序的,1又比第一个元素小。
Never mind, if you are doing that strategy, take it from a Brit, most princes are as dumb as toast, not worth waiting for.
如果你真的采取这个策略,记住这句英国的俗语吧,王子和土司一样蠢,不值得你去等的
The truth of the matter is if you look at the technology industry, there's always a few big guys, some medium size guys, lots of small guys, and the names are always changing because the industry is so darn dynamic, and there's so much new stuff being invented.
真相是,如果你回首科技行业,人总会分为三六九等,耳熟能详的名字总在变化,因为这个行业发展实在太快了,有如此多的新事物被发明出来。
A weird thing which is discussed in the textbook is if you wait a while and then you try it again with the bell after a couple of hours, the saliva comes back.
教材中讨论了一件奇怪的事情,如果你稍等一会,在几个小时之后用铃声重新去尝试,狗会重新开始分泌唾液。
If you have questions-- and this will be on our website, it was in the email you were sent, and then it'll be here too when I post the course lecture notes-- contact these particular teaching fellows if you have questions about these particular parts of the course.
各位如有疑问,网站上会有相关内容公布,发给大家的邮件里也有,等我演示讲义时也会出现,如果各位对课程的某些部分有疑问,请联系这几位助教
If so how? And once again he puts forward different arguments; in Book II chapter 8 he compares law to other arts and sciences and suggests why sciences such as medicine and has exhibited progress this should be true for law.
如果可以,如何改?同样地,他从不同的角度来推论;,在第,II,册第,8,章中,他对比法律,与其它的艺术与科学,并暗示像医学等科学都已显示进展,法律也理应如此。
And if you use this little magnet you can draw a mustache or hair, or eyebrows or whatever on this particular face.
如果你想使用这小磁铁,就可以画个小胡子,或者头发或者眼眉等。
That's a lot harder of a problem to solve if you need to reconstruct the fragmentation, yeah.
如果你需要重构这些碎片,会有很多很难的问题等着我们。
So if we want to write out what that would be, it would just be to say that f minus is isoelectronic with neon.
那么如果我们把它写出来,它应该就是负一价的氟离子与氖原子是等电子的。
The spec, if you want to add a little bit of color shows you obviously how you can add green and red and so forth.
如果你想添加一点颜色,说明书中详细说明了该如何添加绿色,红色等。
So, we can say that -- if we have neon here and we want to think about what's isoelectronic, -- f minus would be isoelectronic. We also have oxygen -- what would the charge on oxygen be? Um-hmm, right. 2 minus.
那么,我们可以说--如果我们这里有氖原子,而我们想知道与它等电子的是什么,负一价的氟离子就是与它等电子的,我们还有氧-,氧应该是几价的?没错,负二价。
Could be done, but easier is to just do the whole thing at constant volume, right, and just run the reaction that way and redo the calculation to be a constant volume rather than constant pressure calorimeter, right.
可以进行测量,但是如果在体积恒定的条件下,做这些会容易得多,还是这样进行反应,但是在等体而不是恒压条件下重新计算。
It could be two or three times.
恩,等一等,如果我想要排序一个列表。
Often a good thing to start with is to put the lowest ionization energy atom in the middle, and if you don't have charge separation then go with that structure, but if you do find you have a lot of separation, such as the case in negative 2, positive 2, and minus 1, then you want to say wait a second, this is really bad in terms of formal charge, let me go ahead and see what other options I have here.
通常一开始把电离能最低的原子,放在中心位置就很好了,如果你发现电荷没有分开,那么这个结构就没问题了,但是如果你发现有很多分开的电荷,比如这种情况,有负二,正二和负一,那么你会想要说等一下,从形式电荷来看这很不好,让我去看看其它可能的选择。
D-A-V-I-D Well, if I've got a five-letter word like D-A-V-I-D, well, that's like five bytes and yet we only have the ability thus far in this class to return one thing at a time I can't return five bytes to you, but wait a minute, those bytes by nature of a computer are just stored in RAM.
好的,如果有5个字母的单词,如,那是5个字节,我们只能返回一个东西,而不能返回5个字节,等一下,这些字节被计算机本能地,存储在内存中。
Similarly, if you're dealing with immature humans and you want your child to get you a beer, you can't just sit, wait for the kid to give you a beer and uncap the bottle " and say, "Excellent. Good. Hugs."
类似的,如果你要训练的是未成年人,如果你想让你的孩子帮你拿一罐啤酒,你就不能只是坐着,等孩子把啤酒拿给你,然后你打开瓶盖,说,“太棒了,来抱一下“
Well basically what we're doing is we're giving ourselves the ability to create data types the same way that we have some built-ins, so we have things like int, float, string, these are built-in data types.
就是要赋值我们自己创建,和内置的数据类型,相同的数据类型的能力,我们有一些内置的数据类型,如int,float,string等,如果你考虑下这些数据类型。
I don't exactly know where they are in RAM, but I know if I've got 2 gigabytes of RAM, zero is here, byte 1 is here, byte 2 is here, dot, dot, dot so maybe byte 123 is over here and 456 is here.
我不知道他们在内存中哪个地方,但是我知道如果我有2G内存,零在这里,字节1在这里,字节2在这里,等等等,所以可能123字节在这里,456字节在这里。
But it looks like they're giving away stuff, they're feeding you stuff, and if you're interested in learning a bit more about Microsoft internships and such they have an office in Kendall Square near MIT and that's where I believe this event is to take place.
看起来他们似乎在泄露消息,但实际上是为了满足你们,而且如果你有兴趣,了解更多微软实习等诸如此类的信息,可以到他们在MIT附近的肯德尔广场设立的办公室咨询,而且我相信派对将会在肯德尔广场举行。
It would kind of be unfortunate if every program a out that Microsoft made and Apple made by default was called a.out.
如果Microsoft,Apple等公司,推出来的程序都默认命名为,估计全世界都要崩溃了。
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