discrete variable的用法和样例：
例句
- Moreover, Fibonacci design method was used for structural optimum design with discrete variables.
利用斐波那契数列的规律，提出了离散变量结构优化设计的斐波那契算法。 - Compared with the common optimization design, the mixed-discrete variable optimization method has been widely used in the area of machine design.
摘要在机械优化设计中，混合离散变量优化方法得到了广泛的应用，具有较高的工程应用价值。
