设计基础事故，我们讲过了其中的一些。

Design Basis Accidents, we went over some of them.

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现在，设计基础事故。

Now, design basis accidents.

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尽管它的安全措施与众不同，但是所有的核电站都必须在所谓的“设计基准事故”，即设计中预期到的事故中能够关停下来。

Although its safety features are different, all have to be able to be shut down safely during a so-called "design basis accident," the kind of accident anticipated in its design.

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And will make mistakes. And therefore, you write your programs so that catastrophes don't occur when those mistakes are made.

就是人是很愚蠢的，会犯错误的，因此，你要这样设计你的程序,以达到当犯错误时避免大事故的目的。

麻省理工公开课 - 计算机科学及编程导论课程节选