两个方程式只在Y项的定义上有差别，但是这个差别将使估算结果产生很大不同。
The two equations differ only in the definition of the Y term, but this difference can make a significant difference in the outcome of an estimate.
这个方程式应该明确的定义决策变量、约束条件和目标函数。
The mathematical formulations should clearly define the decision variables, the constraints, and the objective function.
这个方程式应该明确的定义决策变量、约束条件和目标函数。
The mathematical formulations should clearly define the decision variables, the constraints, and the objective function.
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