translation.en: If they're wearing a lap-and-shoulder belt, in this raw data, 19.4 percent die. And interestingly, wearing a lap-only seatbelt, 16.7 percent die. And actually, the theory tells you that the lap-only seatbelt's got to be worse than the lap-and-shoulder belt. And that just reminds you that when you deal with raw data, there are hundreds of confounding variables that may be getting in the way.
translation.zh: 如果孩子戴了腰上和肩膀上的安全带， 在这份原始数据中， 死亡率是 19.4%。 有趣的是，使用仅仅是腰部的安全带， 死亡率只有 16.7%。 实际上，原则上来讲 腰部安全带应该比腰部和肩部都有保护的安全带效果差。 这个数据提醒了我们 当我们看真实的原始数据时， 需要考量成百上千的因素，它们都有可能影响最后的结果。