If the animal exercises or eats, the cells reward the animal by releasing chemicals into the body that make it feel good.
如果动物运动或者进食，这些细胞就分泌化学物质到身体中，让它觉得舒服，以此来奖励这个动物。
If the animal exercises or eats, the cells reward the animal by releasing chemicals into the body that make it feel good.
如果动物运动或者进食，这些细胞就分泌化学物质到身体中，让它觉得舒服，以此来奖励这个动物。
应用推荐