求翻译：At first sight, the idea that we can catch the moods, habits and state of health not only of those around us, but also those we do not even know seems alarming. It implies that rather than being in charge of where we are going in life, we are little more than back-seat drivers, since most social influence operates at a subconscious level. But we need not be alarmed, says Duncan Watts, a sociologist at Columbia University, New York. "Social influence is mostly a good thing. We should embrace the fact that we're inherently social creatures and that much of who we are and what we do is determined by forces that are outside the little circle we draw around ourselves." What's more, by being aware of the effects of social contagion we may be able to find ways to counter it, or use it to our own benefit. "There's no doubt people can have some control over their networks and that this in turn can affect their lives," says Christakis.是什么意思？

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