When you see a friend or a coworker or a classmate smile and say hello. that would brighten their day.

当你见到朋友、同事或者同学，微笑着打招呼，那可以让他们一天美好起来。

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Reduced panic. You know the feeling when you see your parents, siblings or a friend drive up the driveway?

减少恐慌。你应该知道那种当你看见你的父母，兄弟姐妹或者朋友在车道上开车的感觉吧？

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It will continue to become more unusual to see the same 10 results when you and a friend in another state do the same search.

如果你和朋友身居两国，两个人得到10条相同搜索结果的机会将愈加罕见。

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- This one was among our favorite-- "I was you at the CS50 Fair; I went to your station ; to see your program, you were my best friend; but when our hands touched as you handed me a Smiley face sticker, my heart skipped a beat.

这是我们最喜欢的-,“我和你一样在CS50大会上，我到你的网站看你的程序,你是我最好的朋友;,但是当我们牵手的时候,你传给我一张笑脸贴纸，我的心跳加速“

哈佛公开课 - 计算机科学课程节选

When you check it, you see a picture of your best friend and his fiancee.

FORBES: Wyst Turns The Whole World Into A Social Media Site

"When you see a face, you scan it, identify if it's friend or foe and make a decision about whether to move forward or avoid it, " said Dr. Barry Kosofsky, chief of neurology at Cornell Medical Center, who was not affiliated with the study.

CNN: Toddler brain difference linked to autism