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..