（三）违反国家规定，对计算机信息系统中存储、处理、传输的数据和应用程序进行删除、修改、增加的；
Where to Buy: $289 $209.99 at Woot (11-inch)，更多细节参见PDF资料
1.3.1. Overview。safew官方版本下载是该领域的重要参考
// ^^^^^^ refinement using patterns，详情可参考电影
You may have encountered keyboards with an optional lift at the back of the board, raising the top keys higher than the space bar. Every set of hands is different, but for most people, pulling the backs of the hands towards the forearms increases strain. Negative tilt has the opposite effect by sloping in the other direction, lowering the top number keys while raising the edge with the spacebar. Many Alice and some split keyboards offer an optional negative tilt. I found it was more comfortable to enable that feature when I’m standing, and I preferred to have the keys flat when sat at my desk.