Who decides how long a second is? - John Kitching

Who decides how long a second is? - John Kitching

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83 Academic Words Ref from "John Kitching: Who decides how long a second is? | TED Talk"Подробнее

83 Academic Words Ref from 'John Kitching: Who decides how long a second is? | TED Talk'

Who decides how long a second is?Подробнее

Who decides how long a second is?

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