这个软件提供了一个灵活的框架来构建各种应用程序。

This software provides a flexible ___framework for building various applications.

很多程序员喜欢用Django这个框架来开发网站后端。

Many programmers prefer using Django as their ___framework for backend web development.

这座桥的钢框架在去年冬天就已经安装完毕。

The steel ___framework of the bridge was installed last winter.