在真实世界里，对一个联系人来说“最近修改时间”可能没有什么真正的意义，而只是一个模型在系统中怎样被使用、跟踪、持久化的功能而已。
The modified date has no real meaning for a contact in the real world, but is a function of how the model is used, tracked, and persisted in the system.
而且任何优秀的SDK都会带一个手机操作系统的模拟器，这样开发者在电脑上就可以测试软件，而不一定要真正安装到手机上。
And any good SDK comes with an emulator for the OS itself, so devs can test apps without actually installing them on a phone. Apple's got one, but it only works on Macs.
正如所说的，合成驱动不同于模拟驱动在于它能意识到操作系统，有了这种新的意识，操作系统可以把它的驱动模式从一个严格而缓慢的模拟方式转变为一种我称之为和真正的驱动“握手”过程或一种桌面快捷方式。
With this new awareness, the operating system can change its driver mode from one of strict and slow emulation to what I call a "handshaking" process with the real driver or a desktop shortcut.
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