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Do you have available to you what we call the hacker editions in more details on those in the courses syllabus?
你是否有黑客版套题,比教学大纲上的版本更详细？
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So, why don't you go ahead and take 10 more seconds on this second clicker question for our intro.
请大家再花十秒钟的时间,来做一下第二个选择题。
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I say, well, let's grade about five or six of them, maybe ten of them, get a sense of it.
我说，我们给它们中的5或6道题打分了，也可能是10道，大概了解一下。
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It's a puzzle, but it has for its delight a kind of solitary quality, both of the composer and of the solver of the chess problem.
它是一个谜语，却具有某种令人愉快的自我的特性，不论是设题的人还是解题的人都能感知到。
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If evolution wired us up simply to survive, then it's a puzzle why animals would relate positively to other animals.
如果进化仅让我们生存，那么这是个谜题,为什么动物之间确定有联系。
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Now, as an aside, there's another couple of layers at the very top above the stack and above the heap, but below the tech segment and those are called initialized data and uninitialized data.
题外话，在堆和栈的顶端,还有好几层，但是在技术段之下,他们被叫做初始化数据和未初始化数据。
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If you look at x 2 this one right here in your handout. OK.
课堂材料的第二题2,这是关于做乘方的另外一种方法。
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So, there was just obvious a puzzle that I had to go into.
所以这就像个迷题,我必须去破解。
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When you go today and look at the homework, you'll find the problem from the textbook, one extra problem that deals with all of this.
你们今天回去看到作业,就会看到课本上的一道题目,这道附加题涵盖了所有知识点
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And again, to move back and ask ourselves a larger question, would knowing how much time you have be something that would allow you to actually embrace those choices, ? or would it instead just be a burden?
再一次，回到原题，问我们自己一个更大的问题，知道自己还有多少时间,是会让你实际上接受这些选择呢，还是只是一个负担？
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All right. It's 12:05, so why don't you go ahead and take 10 more seconds on the clicker question today.
好，现在已经，12：05，了，请大家,花十秒钟的时间做一下今天的选择题吧。
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But remember that you do have recitation on Tuesday, so that could be very helpful with the problem-set, so be sure to go to recitation on Tuesday, and have a great long weekend.
记住，周二有习题课，这对做课后题很有帮助，所以周二一定要来上习题课，周末愉快！
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How do I know that that's an absolute pass, though? Well, when we set the exams, we set the tests, I sit with my TA's and we say, all right, let's work out the point scheme on this question.
我怎么知道会是绝对的通过呢，我们制定考试，我们制定测试题，我和助教坐在一起，我们说，好吧，让我们一起来设定这道题的分值。
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And, that's a good thing to know because if you come out with an answer that's somewhere near the diameter of the universe and it's supposed to be the diameter of an atom, then you will know that you probably made a mistake.
这是我们需要知道的,因为当你做一道题得到的答案,是宇宙的直径,而正确答案是原子直径时，你能很快发现你的错误。
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And I know it is only the third quiz, but I like to keep the quiz number the same as the homework number.
我知道这只是第三次小测，但我喜欢将小测题数保持不变,就像家庭作业题一样。
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So, let's make sure everyone kind of has this down, let's do another clicker question here.
好，让我们确保每个人都记下了这点，来做下一个选择题吧。
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But if you are so inclined whether for this problem set or any other throughout the term, you can change your mind week to week.
但是如果你倾向哪套题,那么你可以按周改变想法。
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All you need is ten places to write yes or no.
只要写是或否就行，共10题。
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So we have extra incentive to get these clicker questions right.
所以，大家应该更有动力,把这些选择题答对。
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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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I want to derive the last result in another way, then I will stop, and that's pretty interesting because it tells you the use and abuse of calculus.
让我用其他方法解答最后一个问题,然后今天就到这 这是一个挺有意思的题,因为它展示了微积分的正确用法和错误用法
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So, let's turn to another clicker question here.
那么，让我们进入下一个选择题的环节。
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Raise you hand. Ah,couldn't trick you.
请举手，大家没被这题骗到。
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So let's go to a clicker question.
那么让我们来做一个选择题。
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So the problem I want to do-- there are many things you could do but I just picked one, and this is the one with round numbers, so I can do it without a calculator.
我想讲的这道题,类似的题目很多,但我就选了其中一个,这道题涉及的数字都是整数,所以我不需要计算器
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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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