研究人员还认为，当我们回避与陌生人随意互动时，往往是出于一种错位的焦虑，担心他们可能不想和我们交谈。
The researchers also argued that when we shy away from casual interactions with strangers, it is often due to a misplaced anxiety that they might not want to talk to us.
黑猩猩们还表现出利他主义精神，很愿意帮助陌生人，即使没有预期的奖励。
Chimpanzees even appear capable of altruism, being willing to help strangers in the absence of anticipated reward.
有礼貌还表现在你在电梯里、街上、超市或商场里向遇到的陌生人微笑。
Being polite also means smiling to strangers you meet in the elevator, on the street, in the supermarket or mall.
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