translation.en: If you do the calculations on the ballistics, on the stopping power of the rock fired from David's sling, it's roughly equal to the stopping power of a [.45 caliber] handgun.
translation.zh: 如果你根据弹道学的理论去计算 大卫投出的那个石头的制动能力 基本上相当于 一把口径为0.45的手枪