表达式问题的条件解决方案根本不是真实的解决方案，只是一个尝试，将导致将来更多的维护工作。

The conditional solution to the Expression Problem is really no solution at all, just a hack that will lead to more maintenance work in the future.

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该数学表达式表现为一个具有非线性目标函数及线性与非线性约束条件的大规模0 - 1规划问题。

This formulation results in a large scale 0-1 programming problem with nonlinear objective function and linear or nonlinear constraints.

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