现在研究自底向上开发实例中的继承。
We will now examine inheritance in a bottom-up development example.
在本文中，我将使用自底向上开发来构建一个样本应用程序。
In this article, I will use bottom-up development to build a sample application. The first steps to build an enterprise service for accessing an EIS are as follows.
可以采用两种方法创建 Web 服务：自顶向下开发和自底向上开发。
Web services can be created using two methods: top-down and bottom-up development.
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