There's two--One technical distinction that people love to put on Intro Psych exams is that the difference between positive reinforcement and negative reinforcement.

心理学导论的考试中,会经常考到一个术语上的区别,即正强化,与负强化之间的区别。

耶鲁公开课 - 心理学导论课程节选

The difference is in positive reinforcement you do something; in negative reinforcement you take away something aversive.

区别就是，在正强化中你接受某种刺激;,而在负强化中你回避了某种厌恶刺激。

耶鲁公开课 - 心理学导论课程节选