Older, more experienced grandmothers were better at telling whether other elephants were strangers or friends just by their calls.

年纪更大、经验更丰富的祖母更善于通过其他大象的叫声来判断它们是陌生人还是朋友。

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She found similar interference when participants watched 15-second clips of pairs of people and judged whether they were strangers, friends, or dating partners.

她发现，当参与者观看15秒的不同组人的视频片段，并判断他们是陌生人、朋友还是约会伙伴时，也有类似的干扰。

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Whether I was making friends with complete strangers, or even efficiently planning a vacation, when I look back on my travels, I feel a sense of pride akin to finishing a marathon.

无论是和完全陌生的人交朋友，或者甚至是有效地计划一个假期，当我回首旅行经历时，都感觉像跑完马拉松一样自豪。

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Many of us have become comfortable putting ourselves out there publicly in the hopes of making connections with friends and with strangers, whether through Facebook, Twitter, or OKCupid.

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