Behavior is determined by the current stimulus situation and past reinforcement history.

音乐是灵魂的心跳。

市场经济不仅仅是关于效率，还关乎自由和人的尊严。

"The true essence of a story is not in its plot, but in the emotions it evokes."

No wise pilot, no matter how great his talent and experience, fails to use his checklist..

Knowledge is a consequence of experience.