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And the first thing you do is ask is it an instance of some problem that other people have already solved?
而且你以前从没碰过这个问题,你首先要做的一件事就是问问自己,这是不是一个别人已经解决了的问题？
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So let's actually let you try another example of solving a problem that has to do with one of the spectrums.
下面请大家来看一下另一个例子,这次是一个需要大家解决的关于光谱的问题。
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We want to write a piece of code that helps these guys out, so I'm going to show you an example.
通过写一段代码,来解决一个这样的问题，接下来让我们来看个例子。
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Well, this is a problem that we have solved and will solve in the weeks to come. See you Monday.
嗯，这是我们解决了的一个问题,并且将在接下来几周来解决这个问题，下周一再见。
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And we do so by a quantity called the average valence electron energy.
我们可以通过,一个叫做平均价电子能的量来解决这一问题。
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Well, that problem was partly solved by saying, 'Well,if I'm giving the inoculation to one person, and that's what would happen.
这个问题一定程度上可以这样解决,如果我给一个人接种,然后就可以解决了
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So let me turn to a different approach to solving the question, answering the question,which one should we believe?
所以让我用另一个方法来解决这个问题，回答该相信哪一个理论的问题？
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Now, I want to do one concrete problem where you will see how to use these derivatives.
现在我要解决一个具体的问题,从中你会明白如何运用这些导数
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I think India does have a democratic building mechanism in addressing some such issues.
我认为印度是有一个民主体制,来解决这类问题的。
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Now this is what Derrida is deliberately struggling with in this first paragraph: an "event" , if this loaded word did not entail a meaning thought to reduce or to suspect.
这就是德里达,在第一段着力解决的问题：,一个事件，加引号的，…,如果这个词的意思没有,减少或怀疑的意图。
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And we'll need a tiebreaking assumption and we'll do the obvious tiebreak.
我们需要假设一个解决平局的方法,我们确实也需要解决平局问题
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OK. Binary search is perhaps the simplest of the divide and conquer algorithms, and what does that mean? It says, in order to solve a problem, cut it down to a smaller problem and try and solve that one.
好了，二分搜索也许是,最简单的分治算法，这意味着什么？,也就是说，为了解决一个问题,把它切割成小的问题,然后再来一个个解决。
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I'm thinking about a problem, I'm going to show you an example in a second, first thing I'm going to do is say, what is the thing that's going to change every time I run through the same set of code?
我要解决一个问题，我马上会让大家看一个例子，第一件我要做的事情就是,弄明白每次运行同样的指令集时,每次都会改变的东西是什么？
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Let's quantify the energy value. If you go through and solve for energy, you will get this equation.
我们来确定一下能量值，如果你试图寻找,解决能量问题，你能得到一个方程式。
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Now as for all these data sizes, let's close one outstanding question.
现在为了这些数据量，让我们先结束一个未解决的问题。
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You can take a problem that might be relatively intuitive to solve but when you scale this thing up as is increasingly the case in the web, in large data systems, and so forth, you actually have to now think smart, you actually have to think efficiently and you have to solve this problem effectively.
你可以把一个问题用比较直观的方法解决,但如果你把此类问题的数量增大,正如越来越多的互联网，和大规模数据系统中出现的问题等等,你应该考虑怎样才能更简便，怎样才能更高效,你应该用行之有效的方法处理问题。
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And we hope that at the end of the class, every time you're confronted with some technical problem, one of your first instincts is going to be, "How do I write the piece of code that's going to help me solve that?"
并且我们希望到了期末，每当你要面对一些,技术问题的时候，你们的本能之一将会是：,“我怎么才能编写一个代码,来帮我解决这问题？“
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People tend not to realize that the first question you should always ask yourself, is this really just something that's well-known in disguise?
已解决问题呢？,这是一个最短路径问题吗？,这是一个最近邻居问题吗？
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Here, the problem is solved by injecting it directly into the cell, shown here, and then that's one issue with gene delivery.
现在,这个问题已经通过,将其直接注入细胞的方法解决了,图上这里,这只解决了基因输送的一个问题
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So that you will come away with a sense of what you can do, what you can't do, and what kinds of things you should use to tackle complex problems.
因此你们才能对,你们能做的事儿，不能做的事儿,和用何方法去,解决棘手问题有一个基本概念。
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If I want to try and decide how to tackle a problem in an iterative matter, here the steps I'm going to go through. First thing I'm going to do, is I'm going to choose a variable that's going to count.
但是这就是我对它的观点,如果我试着去以迭代的方式,解决一个问题的话,下面是我应该采取的步骤,第一件要做的事情。
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We're going to do the same thing here, we're going to chart out a little bit of what should go into actually making this thing work.
我们要去画一个小小的流程图，来指导问题的解决,那么这里是一个很简单的。
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There, they're just storing a database of previously solved problems.
好了，它就是一个存储之前,解决过的问题的数据库。
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The heap offers us a solution to that problem.
堆就为那个问题提供了一个解决方案。
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Well, however we settle that issue, notice there's still one other assumption that all these positions still have in common.
不管我们如何解决这个问题，我们都会发现有一个假定,是这些观点都共有的。
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OK. I know. It looks boring. But it's a structure of the things I want to think about when I go through trying to take a problem and mapping it into a iterative program.
好，我知道这看起来有点无聊,但是这是我要去以迭代的方式,去解决一个问题采取的,措施的大致结构。
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That doesn't solve the problem we had before though Then I'm going to append it, and keep the last change for future use.
这样没有解决我们之前的问题,所以我要给它加上一个值，让上一次的变化能够用到未来的例子中。
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We call that a base case. It's basically the simplest possible solution to the problem.
我们说这是一个基础案例,这是这个问题最简单的解决方案。
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That's a big issue. You can fix one thing, you break something else.
你可以解决一个问题，但你破坏了其它的程序。
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You want to take a new problem and say, what does this most look like?
当你要解决一个新问题时，你应该想想这个问题看起来和什么最类似？
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