... 不可能的，办不到的 impossible; out of the question 实际上办不到的 virtually impracticable 办不到的，不可能的；不必谈的 out of the question ...
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事实是世上的Google们办到了Sun自己单独办不到的事：网络实际上就是计算机。
The fact is that the Google’s of the world have made real what Sun itself could not: a network that is, in fact, the computer.
正如文中所指出的那样，绝大多数组合与时序优化问题，实际上都是NP -完全问题，因而试图给出现实可行的一劳永逸的通用算法在目前是办不到的。
Just as this paper points out, most problems about combination and sequential optimization are in fact NP-complete, so, it's impossible to find a general algorithm to solve all the problem presently.
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