decision variable

例句：

1. 1. The decision variable is theinput that determines the output of themodel.
   决策变量是模型的输入，决定了输出。
2. 2. In this case, the decisionvariable is the number of employees required tomeet the production target.
   在这种情况下，决策变量是达到生产目标所需的员工数量。
3. 3. The decisionvariable is critical in determining the optimalsolution for the problem.
   决策变量在确定问题最优解中起着关键作用。