Sometimes convenience or practical necessity or just the fancy of an influential person can establish a fashion.

有时，某种便利或实际的需要，或仅仅是一个有影响力的人物的幻想就可以引领一种时尚。

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Mining (e.g. Find out the most influential person in Silicon Valley).

挖掘(比如说找到硅谷中最有影响力的人)。

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The magazine has been selecting the year's most influential person, group or idea since 1927.

《时代》周刊自1927年开始每年评选最有影响力的个人、团体或创意。

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If you are an influential person, expect the perks to start rolling in.

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One gaming website voted him the joint 18th-most-influential person in computer games, quite an honour for someone who hardly played them.

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Mr Litman backs up his concern by saying that, according to Klout, the most influential person in the world is Justin Bieber.

BBC: Business