Over time, as people are uprooted from their agricultural communities as industrialisation tears apart people's familiar attachments, individuals become "alienated", he says. "They start looking for one other individual to save them, to save them from the wretchedness of their lives."
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But there’s also that annoying, gnawing truth: You don’t know what you don’t know. This has, for decades, been an apt adage for describing life in this experimental orbital colony. Eventually, though, different aphorisms will come into play. Yes, it’s true: You don’t know what you don’t know. But we do know that all good things come to an end. And that what goes up must come down.
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At a national level, a survey by insurer Direct Line published in December suggested that nearly four million UK adults might be living in a home without any smoke alarm at all. In the US, an estimated 16% of households do not have a functioning smoke alarm.，这一点在同城约会中也有详细论述
Why is this a problem?