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：
They went up as astronauts and came down celebrities. The people of the Earth had followed their every move on TV.
，更多细节参见爱思助手下载最新版本
The Soundcore Work is now $99.95 at Amazon. That knocks $59.05 off its $159 list price. That's the best price we've spotted on the device, meaning it's a great time to buy.
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