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He created just about the biggest private equity firm from scratch in 1985 and I guess they just went public and they have a huge market cap.
他于1985年白手起家,创建了最大的私募股权公司,后来公司上市,市值相当可观
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and we had to start from scratch together. We did all of our research in the library together.
我们必须从零开始。我们一起在图书馆做研究。
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Scratch So, we looked last week at Scratch, very briefly, but hopefully you found if you've dived in already that the interface is fairly intuitive and it really just allows you to implement ideas that you conjure up in your mind.
我们上周非常简略地提到了，不过我希望你们热切的投入了进去了,那个界面是相当直观的,相信我，这真的可以让你实现你,大脑中的构想。
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Next week, social thought and social behavior, mysteries; basically, a series of topics that don't fit anywhere in the course and really make psychologists scratch their heads.
下节课我们将会讲社会思想,社会行为，神话;,基本上这一连串的话题,在本课程中属于杂七杂八的,而且让心理学家百思不得其解的。
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So, they developed this bifurcated tool, which would be appl--you'd put the stuff on the surface of the tool and then you'd scratch the skin in a certain way so that you could produce sort of a reproducible introduction of the vaccine into the skin.
所以他们发明了一种分为两叉的工具,把疫苗抹在这种工具表面上,然后以某种方式在皮肤上刮,这样就能将疫苗,重复不断地引入到皮下
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They might be,for example,in an accident, and come close to being killed,but walk away without a scratch.
比如说在事故中幸存，差点送命，但结果毫发无伤。
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Thus far and in Scratch will pretty much focus on the idea of correctness: Does your code work as we asked it to and as you intended it to?
至此，人们大都是把注意力集中于正确性,观点上：你的代码是不是根据你的意愿,并按照你的要求来执行呢？
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Scratch And after just a few words on Scratch which we'll look at in more detail on Friday will you actually feel that you know what, this is actually very intuitive.
现在先粗略介绍一下,周五我们会更详细地讲,你会感觉到这其实是很直观的。
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Things very quickly get ugly and you might even already be feeling this tension in Scratch if you're dragging and dropping and moving things around.
是不是很丑呢,如果东丢一点，西落一点,你很快就会不爽了。
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In Scratch, the block you may have used for this idea literally says "or" for or; in C, two vertical bars.
在Scratch中，这个你用的程序块,照字面地想法来说“or“表示或者;,在C语言中，是两个竖线。
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I think they're purple or so in scratch, or yeah, purple, I think, generally; say hi, for two seconds.
我觉得在scratch中，它们是华而不实的，我觉得，通常，显示hi，只要两秒钟。
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In scratch, a condition looks a little something like this.
简单来说，一个条件判断就像这一样。
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scratch Scratch is a program that you can download for free cs50 net and you will see in problem set 0 0 which will be posted on CS50.nettonight under problem sets in both standard and hacker editions, can you do the--can you--it will walk you through the process of getting this software.
你可以免费下载,今天晚上我会在0,放上习套题,这个习题集有两个版本，习题集可以指导你,如何下载这个软件。
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We've seen this branching construct in Scratch, we've seen it a moment ago on the slide, and see, we just need else if to use not an else, not just an if but an else if.
我们看到了这个Scratch的分支结构，我们看到刚才在幻灯片中，了解到，我们不需要,用一个else，也不只是用一个if，而是用一个。
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So really, the rule of thumb if you think back to Scratch is -- that any time you write a statement -- -- something that does something in one line of code -- you generally need the semicolon there.
实际上，根据经验，你们回忆一下在Scratch中,任何时候你们写一条语句-,处理一些操作的一行代码-,你们通常需要在那里加个分号。
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itself and introduce Scratch, the programming language in an environment we looked at, but also some of the fundamentals that we'll lace throughout the course.
这周五我们就开始讲计算机科学，并在我们设定的环境下,介绍编程语言Scratch的用法，而且我们也会在课程中,捎带讲一些基础知识。
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When you created a variable in scratch, you could either make it for this sprite only or for all sprites. All right.
当你在scratch中创建一个变量，你可以只为这个精灵创建,或者为全部的精灵而创建，好的。
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So variables you were introduced to in scratch, and there was this idea of global and local variables, but scratch called them something a little different.
在scratch中所介绍的变量，这里有一个全局变量和局部变量概念，但是scratch中有不同的叫法。
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And you might have started doing these kinds of things in Scratch as your programs got more sophisticated.
并且你可能已经开始在Scratch中开始做这种事情了,随着你们的程序变得越复杂。
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Well, that program was interesting because it had an inventory which was implemented in Scratch with a list which is kind of like a container that you can add things to again and again.
那个程序很有趣,它有一个用Scratch做出来的清单,还有一个貌似容器的列表,你可以不断往里面加东西。
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In Scratch you may have realized that, "I could implement my program this way with these puzzle pieces, but it kind of feels -- like I could use these puzzle pieces instead" -- that's absolutely the case in programming.
在Scratch中你可能已经意识到，“我可以用这一段代码来,执行我的程序，不过这有点感觉到,我可以用这些代码段来代替“,那绝对是编程中的一个情况。
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So the translation here is that whereas last week and in Scratch, the looping structures are yellow and have kind of this brace structure to them.
同理，大家回想一下上个星期,在Scratch软件中，循环结构都用黄色标记出来了,与此类似。
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> So this thing here, when green flag clicked say, oh, hi world, this was perhaps the simplest program we could write in Scratch.
>，我们先看看这个例子，“点击绿旗“下面显示“,这也许是我们用Scratch软件写出的最简单的，程序了。
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And in Scratch did you probably see the key word "and" on one of the blocks.
在Scratch中，你们大概看到那个关键字,“and“在其中一个程序块中。
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This is what you typed into the white box in Scratch and anyone perhaps already familiar, the backslash N is the shorthand way of saying what?
这也是你们在Scratch的白色输入框里要填入的东西,也许已经有人知道，反斜杠n代表某种简写方式吧？
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Here, print F, recalls a statement and just like in scratch, statements were these one-liners.
这里，printf，召回了一个语句,像在scratch中，语句是这些单行方式的。
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So this is the simplest program you can probably write in this language called Scratch.
这是一个用SCRATCH语言,编写的最简单程序。
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There's no notion of naming a script as you can a function in scratch.
这里没有一个命名一个脚本的概念,而你可以在scratch中命名一个函数。
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> So this tune made by one of our former students; but it doesn't have to be something written in Scratch, it doesn't have to be a game or animation it can simply be an incredibly, wonderfully way to spend time.
这段是由以前的学生制作的;,不一定非要用Scratch编写，也不一定必须是个游戏或动画,它只不过是用来打发时间的，一个好办法。
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