One prevalent quality we have found in teens' statements about themselves, their friends and their families is a strikingly positive emotional tone.

我们在青少年关于自己、朋友和家人的描述中发现的一个普遍特征是，它们都带有一种非常积极的情绪基调。

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One prevalent quality we have found in teens, statements about themselves, their friends and their families is a strikingly positive emotional tone.

我们在青少年身上发现的一个普遍特征是，他们对自己、朋友和家人的描述都带有一种非常积极的情绪基调。

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The tone of your letter should professional, positive and informative.

务必保证你的求职信的基调是专业、积极和翔实的。

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President Obama denied the charge. The summit host,Trinidad and Tobago Prime Minister Patrick Manning, praised President Obama for a positive attitude, which he said set a congenial tone that ensured success at the gathering.

VOA: standard.2009.04.19

Twitter, the study found, had a far more negative tone than positive.

FORBES: Pew: Social Media, Especially Twitter, Relentlessly Negative Place for Election Talk

Joe Biden, Obama's running mate, said he hoped McCain would finish the campaign with a positive tone.

CNN: Obama, McCain campaign through swing states

Al Mansour, who made the movie with the permission of the Saudi government, also struck a positive tone Sunday.

WSJ: 'Wadjda' prompts women's rights talk at Tribeca