derived model的用法和样例：
例句
- Host items in application-level projects do not derive from classes in the host application's object model.
应用程序级项目中的宿主项不是从宿主应用程序对象模型的类中派生的。 - As the conclusion to this chapter, the theoretic background of the Derivational Analysis Model is introduced to the reader.
最后对派生分析法这种模型的理论背景作了说明。
