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But another clue is the sort of smiles they give when they see each other when they walk into the lab.
但另一个线索是他们给出的微笑,当他们走向实验室时碰到对方。
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Then when a stranger approaches or someone else approaches there they'll tend to give more of a greeting smile.
当陌生人或其他人接近时,他们是问候式微笑。
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One group of children was a control group; the second group was taught to think back to experience that make them laugh or smile.
一群小孩组成对照组;,有人教第二组小孩回想,让他们大笑或微笑的经历。
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So, they knock down all the pins but what they don't do, is they don't smile after they knock down the pins.
所以，他们撞到了所有障碍物，但他们没有做什么，他们撞到后没有微笑。
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The mouth moves up, particularly if somebody is attacking their record or ridiculing them, and they'll smile and--but it's not a sincere smile.
嘴唇移动，特别当有人攻击他们的记录,或嘲笑他们时，他们会微笑，但不是真诚的微笑。
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They'll smile appropriately, making an important point that smiling is not learned by looking at other people's faces.
他们会适当地微笑，说明微笑不是学习的,通过观察其他人的面部表情。
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You give it when you want people to like you, you want to join in; you want to make people feel positive about you.
当你想让人喜欢你时会有这种微笑，你想加入他们;,你想让人们对你有好印象。
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Then when they stand up and face the crowds, there's a big smile.
但当他们面对人群站立时，他们露出了大大的微笑。
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Politicians are often in contexts where they have to smile a lot.
政治家的环境,他们不得不经常微笑。
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And what they do is they simply give the Pan Am smile.
他们通常是泛美式微笑。
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When their mother approaches there they give a real happiness smile.
当妈妈接近时,他们是真正开心的微笑。
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Then they turn around to their friends and give a big grin.
然后他们转向朋友们，露出了大大的微笑。
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Pan Am is a now defunct airline which had at that time They were--They don't call them stewardesses anymore but they're-- the stewardesses would come in and they would smile.
泛美现在已经倒闭了,他们不在称之为女服务员了,但是他们是-,女服务员进来就会微笑。
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But they don't actually stand on the podium grinning.
但站在领奖台上，他们没有微笑。
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And it turns out that there's a correlation, a reliable relationship between how happy somebody is now and back thirty years ago in their yearbook photo-- what sort of smile they're giving.
事实证明有相关性，可靠的关系,现在很开心的关系，30年后也是,在他们的年鉴照片里-,他们给出的微笑类型。
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So, if you smile at somebody, and you just hate their guts but you want to smile at them, it's--unless you're quite gifted it's difficult to fake a really good, really happy smile.
所以，你对某人微笑，你很讨厌他们，但你要对他们微笑，除非你很有天赋,很难去假笑，伪装真正的微笑。
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They are being filmed. They don't smile.
他们正在被拍摄，他们没有微笑。
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They're smiling. You're smiling.
他们在微笑，我们在微笑。
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