Although previous studies have found that the "group velocity" of light can travel faster than c, the "signal velocity" -the speed at which information travels -cannot.

尽管先前的研究已经证实，光的“群速度”可以超越光速c，而“信号传播速度”——光携带的信息的传播速度——不能超越光速。

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Although previous studies have found that the "group velocity" of light can travel faster than c, the "signal velocity" - the speed at which information travels - cannot.

尽管先前的研究已经证实，光的“群速度”可以超越光速c，而“信号传播速度”——光携带的信息的传播速度——不能超越光速。

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When the medium density increases (with more atoms), the slow group velocity decreases.

当介质的密度增加时（包含更多的原子），群速度就降低。

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The number of passengers in the U.S. paying for first-class, business-class and full-price economy airfares has halved in the past five years, from 18% to 9%, says the Velocity Group, an aviation consultancy.

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One of his recommendations is Jonathan Miller, a former chief executive at AOL who is now a partner at Velocity Interactive Group, a Los Angeles-based firm that invests in digital media properties.

FORBES: Magazine Article

Meraki combines a high-velocity software development methodology with a tightly linked inside sales and channel model that will form the new Cloud Networking Group.

FORBES: Cisco To Buy Cloud Networking Play Meraki For $1.2B