不止手机，笔记本电脑也曾经尝试过硬件集成的防窥功能，惠普当年的 Sure View 技术方案就是其中一例：
These ideas of the UK and Europe in decline have also been taken up by high-profile, influential figures, including X, Tesla and Space X owner Elon Musk, who spoke at far-right activist Tommy Robinson's Unite the Kingdom rally last year.
，更多细节参见heLLoword翻译官方下载
与摄影器材、舞台灯光类似，它属于活动经济的一部分，而活动经济本身具有明显的淡旺季波动。只要旺季结束，设备闲置率就会上升。
测试题目：一道经典的博弈论逻辑陷阱题。