将一个铁笼子一分为二,把狗放进笼子的一边,一旦在笼子底上通电,狗就会受到电击的刺痛,很快跳到笼子的另一边去,以躲避电击,而当另一边受到电击时,这些狗又会很轻松地跳回来,到没有通电的一边去。然而,一批同样的狗,被放进笼 Divide an iron cage into two. Place the dog on one side of the cage. Once the bottom of the cage is energized, the dog will be stung by electric shock and quickly jump to the other side of the cage to avoid electric shocks. When they receive an electric shock, these dogs will easily jump back and go to the side where there is no electricity. However, a group of the same dogs were put into cages.