One thing that Nava has got me thinking about is the deep history of gesture. Gesture exists on the borderland between nature and nurture. Certain physical actions are so universal that they communicate effectively not just across human societies but across species: bared teeth, for instance. Other gestures encode more specific cultural patterns, but do so in a way that is more expansive than language.
但三星并不是第一家在手机上直接集成防窥屏硬件的厂商，夏普从 LCD 翻盖机时代就已经搭载了类似的技术，一直到 Aqous 时代都有延续：，详情可参考旺商聊官方下载
Деревня на Лофотенских островах，更多细节参见旺商聊官方下载
3. 递归：对左右子数组递归执行1-2步