借助光栅原理，让屏幕发出的光只能从正面特定角度范围内看到，从而实现「大角度防窥」的效果：
因此，本文希望从 .DS_Store 出发，基于与 Windows 平台下的类似文件 Desktop.ini 和 Thumbs.db 的对比，论述 Finder 与 Windows 资源管理器在某些设计方面的差异。，更多细节参见safew官方版本下载
Will other retailers have spring sales?When Amazon launches a sale, it kicks off a game of follow the leader. All the other big retailers — Best Buy, Target, and Walmart — have historically launched spring sales around the same time as Amazon's Big Spring Sale. No official sale announcements have come through yet, but we expect they'll come soon.，更多细节参见Line官方版本下载
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缺点：负区间可能“死亡”，即神经元永远不激活