By the time the blood-alcohol level reaches 0.2 percent-the level of most drunk driver who are not permittde-the risk of an accident is 100 times that of the nondrinking driver.

一般饮酒的司机血液中酒精含量到达0.2%的时候是不允许开车的，这时候驾驶事故发生率是没喝酒司机的100倍。