由于该问题是一个NP -完全组合优化问题，随着问题规模的扩大，往往难以求得最优或满意的机器配置方案。

As it is a NP-complete combinatorial optimization problem, it is difficult to obtain the optimal or satisfying solution with the increase of the problem scale.

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Bob mentioned in his introduction that I showed up at Yale in 1985, after having spent six years on Wall Street, and I was totally unencumbered by any portfolio management experience.

鲍勃在介绍中提到,我1985年刚来耶鲁时,已经在华尔街待了六年,完全没有任何,投资组合管理的经验

耶鲁公开课 - 金融市场课程节选

They might have come from two completely different places, from two completely different species from different parts of the world, and they're put together in a new way and that's why it's called recombinant DNA.

它们也许来自两个完全不同的地方,来自世界上不同地区的两个完全不同的物种,以新的方式组合在一起,所以它被称作重组DNA

耶鲁公开课 - 生物医学工程探索课程节选