You can even set a number to dial when you shake the phone in the event you can't press the button yourself.
即使碰到不能使用按键的情况，通过软件设置，您只要甩动下phone，就能拨打设定的紧急号码。
2
You'll learn how to set up and configure a Remote authentication Dial-In user Service server (RADIUS) on a Linux system to perform authentication, authorization, and accounting (AAA) for users.
您将学习如何在Linux系统上建立和配置一个Remote Authentication Dial - in User Service服务器(RADIUS)，以执行对用户的验证、授权和记帐(AAA)。
3
Putting the dial on "s" tells your camera "I am deciding the shutter speed, you set the aperture for me."