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When you buy a drug, you scratch the panel, you send a text message with the number that you see, and you get a response instantly at the counter if the drug is genuine or fake."
VOA: standard.2010.06.07
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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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> So this was a Scratch project submitted by one of last year's students.
>，这是由去年一个学生完成的,一个Scratch项目。
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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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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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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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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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Well within the next few weeks we will dive into all sorts of languages but the first one is a little something Scratch called Scratch.
在未来的几个星期,我们将接触各种程序语言,第一个就是。
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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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repeat Scratch essentially had the same ideas, but they were call repeat and forever and a few other options.
本质上，Scratch有相同的思想，但是他们叫做,和forever和一些其它的选择。
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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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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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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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And notice, unlike Scratch where some of you might have realized it starts to get a little ugly, you have an "if else" and then you have another here and another one and things start to move and move and move like this, it gets very messy.
请注意，不像Scratch，在那里,你们其中某些人可能认识到它变得有点丑，你有一个“if，else“然后这里又另一个,那里又有一个，代码就像这样开始跳转，跳转再跳转,它开始变得有点凌乱了。
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So when scratch blocked terms, I'd have a four loop or like a forever loop or something and then another one inside.
当scratch阻塞了，我用一个for循环,或者一个永久循环之类的东西,然后另一个在里面。
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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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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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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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Scratch The syntax actually looks reminiscent to Scratch, where you have a puzzle piece reminiscent of this shape, but you have to say "if" followed by a space, followed by in parenthesis, the Boolean expression that you want to check -- more on those in a moment.
这个语法看起来使人想起，那里有一个这种形状的程序块，但是你必须说明“if“后面跟着一个空格，跟着一个括号，一个你需要核对的布尔表达式,-还有更多的。
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And odds are if a week hence, two weeks hence just for fun you decide to reimplement your Scratch project -- or some tiny piece of it, it wouldn't be surprising -- or shouldn't be -- if you end of implementing the same game or animation or whatever using a completely different set of puzzle pieces Same deal we'd see here.
可能一周之后，两周之后，为了好玩,你决定重新实现你的Scrtch工程,或者其中一小部分，它将不会是令人惊讶的-,本来也不应该是--如果你运行相同的游戏,或者是动画，亦或是用完全不同的设置,来运行拼图游戏,我们将看到相同的处理。
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You're not going to start for the rest of your life if you ever need to solve a problem with a computer from scratch, odds are you're going to reach for some off the shelf packages or libraries or tools that other people wrote so that people like us don't have to reinvent the wheel again and again.
如果你想用Scratch来解决问题,却使用其他人写的程序,或者利用现成的资料或工具,这样以来,我们的确可以避免做重复性的工作,但却永远学不会编程。
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