The class provides a series of static and abstract methods to work with one of the two sets of preferences: one for user preferences and one for system preferences.

这个类提供了一系列静态和抽象方法来操作两套首选项(其中一套是用户首选项，另一套是系统首选项)中的其中一套。

youdao

However, if you prefer to work at a more abstract level — using simple APIs or function calls within a program perhaps — this tool may be too low level for you.

但是，如果您更喜欢在较抽象的层面上工作——在程序中使用简单的API或函数——那么该工具对于您来说就过于低级了。

youdao

This initiative offers a abstract programming environment to simplify the work of developers and architects during the lifecycle implementation and process assembly.

这个项目提供了一个抽象编程环境，它能简化开发人员和架构师在生命周期实现和过程装配中的工作。

youdao

Like in any other invention, nobody knows what will work and abstract theory doesn't guide you completely.

正如其他的创新一样,没有人知道哪些是可行的,有时候理论完全无法指导实践

耶鲁公开课 - 金融市场课程节选

For the next 20 years they showcased modern art with an emphasis on African-Americans, including work by abstract expressionist Norman Lewis, Boston-born Lois Mailou Jones (known for incorporating African images into her work) and lesser-known Washington-area artists.

FORBES: Magazine Article

There will also be exhibitions across the Tate dedicated to the work of abstract artist Kazimir Malevich, Germany's Sigmar Polke and a survey of British Folk Art.

BBC: Matisse and Turner in new Tate shows

The wall of a jail cell, smeared with excrement as an act of protest, was filmed with such compositional care that it became, in effect, a work of abstract art, allowing us to forget what it actually was: human waste, applied with human rage, and surely unbearable to the human nose.

NEWYORKER: Hot and Bothered