translation.en: Why? Because as your attention shifts to your cell phone, you are actually losing the capacity to react swiftly to the car braking in front of you, and so you're much more likely to get engaged into a car accident.
translation.zh: 为什么？因为你的注意力实际上转移到了你的手机上， 于是不能对前面的车况 做出敏捷的反应。所以你 出车祸的可能性大大增加了。