人口统计学为你提供了理解和解决这些问题的工具。

Demography gives you the tools to understand and to address these problems.

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不要花费一大段篇幅来说明你的约翰叔叔是如何试图解决这个问题却失败了。

Don't spend a paragraph on how your uncle John tried to fix the problem and couldn't.

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然而，通常情况下，要是吵闹的邻居知道你要报警，问题就能解决了。

Often, however, the problem is solved when the noisy neighbor knows you are going to call the police.

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And when you have an optimal substructure and the local solutions overlap, that's when you can bring dynamic programming to bear.

当你得到一个最优子结构,但局部解决方案有重跌时，你就可以引入动态编程,来解决这个问题了。

麻省理工公开课 - 计算机科学及编程导论课程节选

So I haven't done magic, I've given you a really fast way to solve a knapsack problem, but it's still exponential deep down in its heart, in something.

所以我并没有施魔法，我已经告诉了你,一种快速解决背包问题的方法了,但是某些方面它的核心仍然是指数增长的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Then things suddenly blow up on you, but you'll recover and you'll figure something out and then you'll move from there.

然后突然间爆掉了，但是你会修复好自己而且解决问题,然后你就能从那个经济低谷走出来。

耶鲁公开课 - 金融市场课程节选