Ultimately, we need a filter or a lens to talk about then what is ultimately in control.

最终，我们需要一个视窗，一个镜头,来讨论什么是最终的控制者。

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In the Dolby case, the glasses use multiple coatings on each lens to filter out different sets of frequencies of light.

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Then they developed the pictures and loaded them onto three different projectors, one with a red filter over the lens, one with green, and one with blue.

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The more individuals realize they have a vested interest in creating sustainable systems, the more their social networks can filter content through that lens, shifting the balance of opinion towards more sensible policies.

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