To tune by interface, set the no tunable isno option to 1, which is actually enabled by default in AIX 5.3.

要针对接口来进行优化，可以将 no 可调参数 isno 选项设置为 1，这是 AIX 5.3 的缺省值。

youdao

Return only the device that is associated with the system default device interface, if one is set, for the specified device interface classes.

只返回是与系统默认设备接口关联的设备，如果设置，指定设备接口类。

youdao

By default, an app and a view controller's supported interface orientations are set toUIInterfaceOrientationMaskAll for the iPad idiom and UIInterfaceOrientationMaskAllButUpsideDown for the iPhone idiom.

ENGADGET: Apple seeds iOS 6 beta 4 to developers: here's the changelog