derivational

例句：

1. 1. The new product is a derivative of the old model.
   新产品是旧模型的衍生物。
2. 2.Derivatives are used to describe properties that are not inherent in a substance but can be found in it.
   衍生物是用来描述物质中固有属性以外的特性。
3. 3.The company's research department is responsible for developing new derivatives and improving existing ones.
   公司的研发中心负责开发新衍生物和改进现有产品。