Drupal is written on top of a database abstraction layer, so the framework can be easily extended to other database back ends.
Drupal是在数据库抽象层上编写的，所以框架可以轻松地扩展到其他数据库后端。
This framework also gives developers the ability to create custom controls to produce rich web front-ends.
这个框架也给开发人员创建自定义控件的能力，以便生成丰富的Web前端界面。
The section ends with two chapters presenting Chet's Timing Framework.
这部分最后的两章节讲述了Chet编写的定时框架（Timing Framework）。
The dishwasher includes: the plate rack which is formed by the shell framework and the container which two ends are fixed on the shell framework and form the bottom;
本发明 的配备勺筷类收容结构的洗碗机包括由外壳框架和两端部结合在外壳框架上形成底面的收容架来构成的餐具架；
The dishwasher includes: the plate rack which is formed by the shell framework and the container which two ends are fixed on the shell framework and form the bottom;
本发明 的配备勺筷类收容结构的洗碗机包括由外壳框架和两端部结合在外壳框架上形成底面的收容架来构成的餐具架；
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