dual optimal solution

例句：

1. 1.The dual-optimal solution of this problem is to use both methods at the same time.
   这个问题的双重最优解是同时使用两种方法。
2. 2. The company adopted a dual-optimal solution to reduce costs and increase efficiency.
   该公司采取了一种双重最优解来降低成本和提高效率。
3. 3. The research team proposed a dual-optimal solution that could solve both problems simultaneously.
   研究团队提出了一个双重最优解，可以同时解决这两个问题。