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：
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，详情可参考Line官方版本下载
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习题链接：LeetCode 1944. 队列中可以看到的人数
，这一点在heLLoword翻译官方下载中也有详细论述
Карина Черных (Редактор отдела «Ценности»)
The government said it had "taken action" to clean up rivers, lakes and seas. Southern Water has been approached for comment.，更多细节参见爱思助手下载最新版本