防窥模式还有两档强度可调。打开第二档高强度防窥之后，屏幕基础亮度会略微降低，但侧看过去屏幕会黑得更彻底：
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Psychology and biology offer one way of thinking about "The One", but mathematics puts forward another.，这一点在WPS官方版本下载中也有详细论述
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