每七次交通事故就有一次是驾车者困倦造成的。

One in seven accidents is caused by sleepy drivers.

《牛津词典》

有七分之一的驾驶员患有不利于驾车的健康问题，比如说睡眠呼吸暂停症，它会使人整天感到非常疲乏。

One in seven reported suffering from a health condition such as sleep apnoea that makes them tired during the day.

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