Prosocial Behavior: Behavior that is carried out with the goal of helping other people.
亲社会行为：以帮助他人为目标的行为。
Prototype: The most representative example of a category.
原型：一个类别中最具代表性的例子。
Proximal Stimulus: The optical image on the retina; contrasted with the distal stimulus, the physical object in the world.
近端刺激：视网膜上的光学图像；与远端刺激相对，远端刺激来自世界上的客观物体。
