当限速只有100公里时，生产一个足够大、足够强大、时速能达到200公里的引擎有什么意义呢？
What's the point in producing an engine that's big and powerful enough to go like 200 kilometers an hour when the speed limit is only 100?
正如里索指出的，效率只有相对于一个既定的目的才能有意义。
Efficiency, as Rizzo points out, can only be meaningful relative to a given goal.
并非每一个经过我们大脑的东西都是真实的思想，我们说的只有少部分是有意义的谈话。
Not everything that goes through our heads is a genuine thought, and far from everything we say is a meaningful utterance.
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