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。
The next step is to change the default sound system preferences.
下一步，更改系统声音配置。
If you open up system preferences now, you can see that your desktop is set to cycle through these images.
如果你此时打开“系统偏好设置”，你就会看到你的桌面已经被设置为这些图片的循环了。
Dive into System Preferences and there are more changes to be seen.
进入系统设置，将会看到更多变化。
The latter technique, which I favor, must first be turned on in System Preferences.
我喜欢后面一种方法，但是必须事先通过System Preferences进行设置。
You can set it to do this in the Energy Saver preference pane in System Preferences.
你可以在“系统偏好设置”的“节能器”选项中设置。
For Mac: Open System Preferences under the Apple menu, click the Accounts icon, and then click the Login Items TAB.
苹果电脑(MAC系统)的做法：打开“苹果”菜单下的“系统偏好”选项，点击“账户”图标，接着单击“登录项目”标签。
Macintosh users are accustomed to using software Update in system Preferences to upgrade the operating system and system software.
Macintosh用户习惯使用系统偏好设置中软件更新来升级操作系统和系统软件。
Fixes an issue in which dragging an application from the list of application assignments in Spaces System Preferences does not assign the application to the desired space.
解决在Space的系统设定选项中，将应用拖曳到应用指定列表后，并未将该应用指定到特定Space的问题。
Fixes an issue in which dragging an application from the list of application assignments in Spaces System Preferences does not assign the application to the desired space.
解决在Space的系统设定选项中，将应用拖曳到应用指定列表后，并未将该应用指定到特定Space的问题。
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