There is also positive reinforcement from the dopamine-induced euphoria, again leading to more drug use.

多巴胺介导的欣快感也会产生“正强化”，又一次导致滥用。

This reward-based learning process is called positive and negative reinforcement, and basically goes like this.

这类奖励为本的学习过程，称之为正强化和负强化，基本上是这样运行的。

Once they start applying the positive reinforcements with the dog and teaching the dog and the dog is responding.

他们开始对狗狗进行正强化训练教导狗狗的时候，狗狗就会做出回应。