在我开始修改那个演讲，期望找到主题思想和连贯性的地方，我碰到了一个又一个不合乎逻辑的推论。

When I began to revise it, where I expected to find meaning and consistency, I encountered one non sequitur after another.

youdao

一旦我们碰到这种情况，我们的第一反应就会想找到别人来倾诉，告诉他们我们是多么伤心。

Once we meet that situation, the first reflection of us is to find some people to tell them how sorrowful we are.

youdao

然而，在我们的宇宙里很少找到反物质，因为一旦它碰到正物质，即刻就会湮灭掉。

However, it's rare to find antimatter in our universe, since it annihilates almost instantly when it comes into contact with matter.

youdao

And part of it is we want you to learn how to have a catalog, if you like, of different classes of algorithms, so that when you get a problem, you try and map it into an appropriate class, and use the leverage, if you like, of that class of algorithms.

另外我希望你们能学会,如何制作一个关于，算法不同课程的目录，这样当你碰到问题的时候，你可以去找到合适的课程，然后在那门课程中，寻找解决方法。

麻省理工公开课 - 计算机科学及编程导论课程节选