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And I had mentioned several times thatyou do not need to memorize the majority of the equations and you don't need to memorize any physical constants.
另外我已经提过好几次了,绝大多数的公式大家都不需要去背,也不用去记任何物理常数。
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Also, it can be a rhetorical question or a question that does not want to be answered.
当然，这也可以用在问一种修辞的问题，或一种不需要回答的问题。
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Again, don't worry too much about the equation, we're not really going to do any math here, I'm just putting it in for completeness.
对这个方程也不需要太深究,在这里我们不强调数学运算的,我把它写出来是为了表述完整
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And indeed,it doesn't seem as though we have to require the entire brain, just enough of the brain,however much that turns out, to house personality,memories and so forth.
事实上，也不需要整个大脑，只需要包含着人格和记忆的，那部分大脑就够了。
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.. In 1799, it would cost so much to mail a letter-- I don't know exactly, something like $10 or $20 to mail a letter at today's rate-- and it would take a long time get there.
在1799年，寄封信需要花费-,我也不清楚具体的数字,大概相当于现在的10到20块钱-,而且还要花很久才能送达。
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you can look on your notes, C it also says structure a, b, and c on your notes, so you didn't need to have just memorized that slide.
大家可以看你们的讲义，讲义上也把它们叫做结构，A，B，和，因此大家不需要去记那张幻灯片。
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I mean, it reminds you when it’s your friend's birthday, so you don’t have to remember.
朋友的生日也会有提醒，所以你不需要记住。
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Now, I'm not introducing any genetic material at all so I don't have to worry about it replicating because there's no genetic material, all I do is deliver the particles.
这样就根本不用引入任何遗传物质,所以我也不需要担心它会复制,因为根本不存在任何遗传物质了,我所要做的只不过是接种部分微粒
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I don't know. It's concentration, I guess. I don't know.
我不知道。这需要集中注意力，我猜。我也不清楚。
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You certainly shouldn't change anything about the function.
你当然也不需要改变函数的什么东西。
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If you some sort of come to the realization that you don't really need sort of material things you don't need success to be happy Just enjoy what you have.
就是当你在现实中意识到自己,并不需要太多物质资料过活,也不期望自己为成功而喜悦,只是满足于你所拥有的即可。
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Now we're in trouble and I say, don't run away! There are no techniques, there are no maneuvers, there are no -- you can't do anything and so they didn't practice very much, except one stunning exception, the Spartans.
现在形势不妙,我说,"弟兄们,顶住",这些不需要技巧,不需要熟练的动作,也不需要--,你对战场上的一切都无能为力,因此他们也不需要什么操练,唯一让人赞叹的特例,就是斯巴达人
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But it's not necessarily the other way round
但这也不需要反过来改变什么，
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I don't really care what key he's in 'cause I don't have absolute pitch, but I can find well, maybe it's a I,VI,IV,V,I chord progression or a I, I IV V I V,I progression or I,IV,V,I.
我也不需要知道他所用的调号，因为我不知道确切的音高，但是我能听出其中的和声，可能是一个，I，VI，IV，V，I级的和声进行，或者，是一个I，V，I的进行，或者。
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These won't be graded, you don't have to turn them in, it's just to give you some extra practice if you want while you're studying for the exam.
这些题目不会记分，你们也不需要交上来，只是如果你需要的话，这可以让你,在准备考试的过程中得到更多的训练。
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As shown in this cartoon here, again you don't need to know the details of this, but if you're interested in knowing what's the biological bases of the genetic code this is it.
像这个动画里画的那样,这里你也不需要了解细节,不过如果你很有兴趣想知道,遗传密码的生物学基础
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So that means that we don't have to worry about things like wave functions when we're talking about Lewis structures, but because they're so simple to use and because they so often predict the electron configuration of molecules accurately, we end up using them all the time in chemistry, so it's very valuable to know how to draw them correctly and to know how to work with them.
因此这也就意味着我们在讨论路易斯结构的时候,不需要担心波函数之类的东西，但是由于路易斯结构不仅简单易用,而且用它来预测分子的电子排布,经常可以得到非常精确的结果，结果我们在化学中一直都在用它，因此知道如何正确地画出并运用,路易斯结构是非常有价值的。
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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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Well, what's nice about this program is that there's just one function, main, so we don't need to draw the stack and get things all complicated.
这个程序的优点是,这里只有一个函数main，这样我们就不需要,画出堆，也不用那么复杂。
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