There is a scratch panel - just like a lottery ticket with number on the drug - each drug has a different number.

VOA: standard.2010.06.07

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。

哈佛公开课 - 计算机科学课程节选

All we're going to do here is really just, once again, scratch the surface.

我们在这里只是，肤浅地解析一下。

耶鲁公开课 - 死亡课程节选

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

耶鲁公开课 - 金融市场课程节选

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。

哈佛公开课 - 计算机科学课程节选

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。

哈佛公开课 - 计算机科学课程节选

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。

哈佛公开课 - 计算机科学课程节选

As an aside, if you ever just have one line of code that you want to execute, one puzzle piece in Scratch terminology, ; you actually don't need the curly braces; you only need the curly braces if you have two or more lines of code that you want to execute if that condition is true.

此外，如果你只有一行代码,需要执行，在Scratch，术语中叫做,一句代码，你就不需要使用花括号了;,如果那个条件成立，你有两行或更多行的代码时需要执行时,你就需要花括号。

哈佛公开课 - 计算机科学课程节选