有些人总是走近完全不认识的人跟前，问人家是干什么的。

Some people are always coming up to perfect strangers and asking them what they do.

《柯林斯英汉双解大词典》

在街上给完全不认识的人一个微笑吧。

Give a smile to a total stranger on the street.

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如果我帮一个完全不认识的人做了一件好事，那会怎样？

What if I did one nice thing for a complete stranger?

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