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# Use Youtube player (with Youtube AD) #<<<>>> # Use our player (Downlaod, Unblock & No Youtube AD) 再生できないときはここをクリック　click hrer if failed to load 如无法播放请点击这里#

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As we celebrate our anniversary and look ahead to our next 75 years, achieving measurable, meaningful change will continue to be at the heart of our mission.
How Teens Use Social Media | The Pew Charitable Trusts