Magician please the audience selected a card, and then will come up with a small LED light, please check the audience clearly does not have any special lights.

魔术师请观众选出了一张牌，之后拿出一个会发光小灯，请观众检查清楚，小灯并无任何特别。

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The new application of the white LED, the structure and principles of Card Light as well as its application in life are described.

主要介绍了白光led的新应用——卡灯的结构和原理，及其在生活中的应用。

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This consequence as led to speculation by science fiction authors Joe Haldeman and Orson Scott Card that people could travel in spaceships at near-light speed for what to them would be only days or weeks, but would be centuries back on Earth.

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