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Driving for more than two hours a day negatively affects IQ levels, scientists have warned. 科学家警告称，每日驾驶时间超过2小时会对智商产生消极影响。 In what might come as unwelcome news for middle-aged commuters, a recent study found that long periods behind the wheel could speed up the effects of age on the brain. 最近一项研究发现，长期驾车会加速大脑老化，这对中年通勤族而言并非好消息。 The researchers said that the results could be explained by the fact that the mind is less active on long car journeys. 研究人员表示，产生这一结果的原因可能是在长时间驾驶过程中，大脑不如往常活跃。 | 
