derived envelope

例句：

1. 1. The company's new product was a revolutionary improvement on the traditional design.
   这家公司的新产品设计是对传统设计的一次革命性改进。
2. 2. The research team has developed a new algorithm to derive envelopes from complex data sets.
   研究团队开发了一种新的算法，可以从复杂的数据集中推导出信封。
3. 3. The new policy will allow for more flexibility in the management of derived envelopes.
   新政策将允许在管理衍生信封方面有更多的灵活性。