translation.en: Theoretically what this means is that in order to express this gene, in a violent way, very early on, before puberty, you have to be involved in something that is really traumatic -- not a little stress, not being spanked or something, but really seeing violence, or being involved in it, in 3D.
translation.zh: 因为从理论上来讲， 若想让这个基因发挥其作用， 引发暴力， 那么在很早的时候，在青春期之前， 你就必须经历一些非常惨痛的事情， 不只是一点小小的压力，不只是被打屁股这么简单， 而是真正目睹暴力， 或者是置身其中。