What separates colubrids from other snakes we have been classifying as venomous, is not the lack of venom, but the lack of an effective way to deliver the venom into its prey.

将黄颌蛇与其他被我们归类为毒蛇的蛇区别开来的，并不是它们没有毒液，而是缺乏一种将毒液输送到猎物体内的有效方法。