expansion operator

• 膨胀算子

expansion operator的用法和样例：

例句

1. Every normal operator is trivially subnormal.
   每一个正规算子显而易见地是次正规的。
2. In addition, an unconventional crossover operator is given to meet the constraints of the DM problem.
   同时，设计了用于满足决策问题的非常规交叉算子。