"The first reaction is to be sympathetic,like,'Oh,wow, these are really sad stories and I feel bad.' And then,the second thing that happens is you look up the crime and you are horrified,".
VOA: standard.2009.10.21
and I think that we should take a second look at them.
我也认为我们应该反思一下。
You remember they're wandering around the forest without her picking berries. The younger brother, - the second brother, is most concerned about his sister's safety -- so I want you to look at this passage.
你们记得他们在树林中游荡,没有拿他们采摘的果子,小哥哥,也就是二哥哥,是最关心他妹妹安全的-,所以我想让你们看这篇文章。
I want to abstract that. And the abstraction you see, right here. I'm going to highlight it for a second so you can see it. I want you to look at it on the handout as well.
我需要进行抽象,这个抽象就在这儿,我把它强调给你们看看,我希望你也能看看讲义里的这部分内容。
Good, this can't be an equilibrium because look what happens if Claire Elise stands a second.
很好,这不可能是个均衡因为,如果克莱尔·伊莉斯站起来会怎么样
And now we're asking you to look at krypton, so the atomic mass is 36. You can actually just grab that handout the second handout on the exam and look at the periodic table there. So, which of the following ions listed is isoelectronic with krypton?
现在我们请大家来看一下氪原子,它的原子量是,36,大家其实可以拿出这张讲义,第二份关于考试的讲义,看一下上面的周期表,那么,下列离子中,哪一个是与氪原子是等电子的?
to look at the novel in the second lecture.
在下一次课上我会说。
Well,you can just--an engineer will just sit there and isolate that second of sound and then give a "times three" command and "boom," well,look at Pavarotti hold out that note.
嗯,你可以想象,工程师会只坐在那里,分离出的第二个声音,然后给了三拍命令和砰“,好吧,看帕瓦罗蒂能拖出那个音。
So I set about on two missions, the first was to visit high schools around country and talk to young people about their use of digital technology and second was to go online and began to look closely at websites, chat rooms, internet list that young people were creating.
我为此制定了两个任务,第一个是拜访全国的高中,与年轻人进行交谈,关于他们对电子技术的使用,第二个任务就是上网,开始认真研究那些网站,聊天室,以及年轻人们所创造的网络世界。
So I am willing to introduce these ideas but A, because it's not my training and people who are focusing on cultural differences will do a much better job than I do; and second, because what I hope to look into is the universal, things are common across cultures.
所以我想介绍这些观点,但是首先,因为这不是我的专业,研究文化差异的人会比我做得更好;,其次,因为我所希望研究的是普遍事物,不同文化中普遍的东西。
ReadFloat We'll look at it in a second. Let me sort of set the stage up for this -- suppose I want to input -- I'm sorry I want you as a user to input a floating point number.
名字叫,我们来看一会,我先来设置下情景-,假设我想输入,抱歉,我希望你们作为用户来输入一个浮点数。
Second thing I want to look at is, suppose I compare that the one below it.
我要说的第二件事情是,假设我比较它下面的那个对象。
Let's have a look at that second game. I'll read it out for you.
好了我们看看第二个游戏,我来读下
So let's look at the second example, all right, I keep doing that -- this piece of code from here to here gives me a way of now creating a hash table of size 256.
所以让我们来看一下第二个例子,好的,我继续做那件事,这段代码中从这里到这里,是创建一个大小为256的哈希表。
Look around the room a second. Look around yourselves.
看看你们的周围,看看你们自己
So let's look at this code for a second.
那么让我们来看看这个代码吧。
So let's take a look at it for second.
所以让我们来稍稍看一下这段代码。
So I'm going to distinguish in fact between un-handled exceptions, which are the things that we saw there, and handled exceptions. I'm going to show you in a second how to handle them, but let's look at an example.
所以我打算区分开不可处理的异常,以及我们刚才看到的,可以处理的异常,我一会要给你们演示下如何处理他们,给你们看一个例子。
OK? And in fact, if you look at the code up here, and it's on your handout, the very first one, x 1, right here- if I could ask you to look at it-- is a piece of code to do it. And I'm less interested in the code than how we're going to analyze it, but let's look at it for a second.
实际上,如果你看看,你们课堂发的材料上面的代码,第一页上的,就是那-,大家请看看实现的这一部分代码,我不太关心,我们会怎么解释这个代码,首先让我们先看看。
Well, let's look at it for a second.
好了,让我们再看看这段代码。
Second thing they're going to do is let us suppress detail. And in essence what that does is, the functions, and we're going to look at a bunch of examples in a second, these functions are going to give us a way to, in some or in one way of thinking about it is to create new primitives.
第二件要做的事,是忽略细节,函数的本质到底是什么,我们将在接下来的几分钟,举一些例子,这些函数将给我们提供,一种创建原语的思考方式。
Meaning, I'm just going to write a little loop that does that. All right, so let's go back to our code. That's right, let me pull this over a little bit, so I can see it. And what I'd like you to look at, I'm going to highlight it just for a second here, is those two pieces of code.
意思就是我只需,写一个小循环就可以了,让我们回到代码,让我们向下拉一点,我才看得见,我希望你看看这里。
That one's not so obvious. So let's think about this for a second. To sort a list in linear time, would say, I have to look at each element in the list at most a constant number of times.
所以让我们来思考一会,要在线性时间能排序,列表里每个元素最多被使用常数次,不一定是一次,对吧。
I take a look at the second derivative, which is the second order condition.
我需要求出二阶导数,即需要寻找二阶条件
let's look at the next one here, first or is that second line?
或者说是下一行,好的,如果last减去?
Now, just to repeat, again I know I've got some math phobics in the audience, let me just slow down a second, all I'm doing here is I'm saying look at this equation of the pink line, look at this equation of the blue line, X is when they cross, i.e., they are equal to each other.
我再重复一遍,我知道你们之中有些人数学不怎么好,我放慢一点说,我是这么解的,看这条粉线的方程,还有这条蓝线的方程,X是二者的交点,也就是说这点两个方程相等
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