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It's more of a, exam-based class. So, I actually had my exam yesterday, and I have one more later on.
这门课主要是以考试为主。事实上，我们昨天刚刚考了一次，不久后还要再考一次。
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I was talking last time about the concept of election or choice, God's choice of Israel, Israel as the chosen one, which occurs for the first time in the Book of Deuteronomy.
我上节课提到了“选择“这一概念，上帝选择了以色列，以色列成为选民，这一概念第一次出现在《申命记》中。
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So for those of you joining us for the last time, know that the video of Wednesday as will generally be the case is already online.
因此，对于那些最后一次上这门课的同学，周三的视频,会放到网上。
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Now, so there's probably a number of people in this room, so when I first started teaching this class 20 years ago, everybody in the room had had chickenpox.
现在,这间教室中的很多人也许,在二十年前,我第一次教这门课的时候,当时教室里的每个人都得过水痘
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Remember last time, I said that there's different kinds of complexity in our code, and I suggested for simple branching programs, the amount of time it takes to run that program is, in essence, bounded by the number of instructions, because you only execute each instruction at most once.
但是这里有个很重要的点,记得上节课，我提过在我们的代码中，有不同种类的复杂度，而且我还说了对于简单的分支程序,运行这种程序需要的总体时间,大体上，是和指令的数目相关的,因为每个指令只会被执行最多一次。
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It will be held the last day of class.
所以我把考试安排在了最后一次课上
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The other thing that we looked at, which I want to stress again and I'll stress it as many times as I can fit it into lecture, because this is something that confuses students when they're trying to identify, for example, different nodes or areas of no probability.
另外一个我们要考虑的事情，我想再强调一次,而且我以后会在课上强调很多次，因为它很容易让人混淆,这就是当你们在确认，节点或者零概率点时候。
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How many of you are here for the first time who weren't here for the--okay good.
你们有多少是第一次来上这个课,谁上次课没来,好吧
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This is one of the biggest classes at Yale, but I think we've got it so it will be a good and satisfying experience with you.
我们是耶鲁人数最多的班级之一,但我想我们会让这门课,成为一次美好和令你们满意的经历
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The final project for this course, as you know is a presentation that you'll give whether it's for the students or the extension school students.
这门课的最后一份作业，是由你们做一次报告,选修和专修学生都要做。
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I took a programming class and did okay in it.
我上过一次编程课，成绩也还可以。
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Again, the point today is not for you to understand in detail all these mechanisms but to understand how those basic concepts we talked about last time, basic concepts of cell communication if arranged in the right kinds of ways can lead to complex outcomes.
再说一次 今天的重点不是,要你理解这些机制的细节,而是借此理解上节课讲的基本概念,细胞通讯的基本概念如果安排得当,可以产生非常复杂的反应
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What I'd like to do--and this will be the first time I've the clicker thing in the class so let's try out this little quiz and see how it works.
我想要--这是我第一次,在课上使用表决器,所以我们先做个小测试看看效果如何
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And as a reminder, hopefully I don't need to remind any of you, but exam 1 is on Wednesday, so rather than our clicker question being on something from last class, which is exam 2 material, let's just make sure everyone remembers some small topic from exam 1 material, which is the idea of angular nodes.
而作为一个提醒--我希望大家都不需要提醒，但是这周三就要进行第一次考试了，因此我们的这个选择题,不是关于上节课内容的，那是第二次考试的内容，这里只是想确认大家都记得,第一次考试所要求的一些小问题，也就是关于角向节点的概念。
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It's a more powerful method than something called a cross-sectional study, and I'll come back in a later lecture and talk about these in more detail, but a cross-sectional study means you're taking a snapshot of a population of people at one time.
这种方法比所谓的横断面研究更加有效,我将在以后的课中,再仔细讨论这个问题,但横断面研究是指,你一次记录下一群人的状况
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Again it doesn't require the effort that you'll need in 55 or in English 10A.
再一次它不需要你像55号课和10A号英语课那样的努力。
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This is the end of week four.
这个第四周最后一次课。
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All right, one more lecture.
好了，我们还有一次课。
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Our first review section will be in the week of January--with your teaching fellows-- will be in the week of January twenty-eighth and we're going to have to ask you to sign up with one of the teaching fellows.
我们的第一次复习课,将在一月。。。和助教一起-,将在1月28日所在的那周,我们会叫你们，选择和一个助教合作。
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> This is CS50, the end of Week 2.
>，这是CS50课程，第二周的最后一次课。
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