Dream big, work hard, and stay focused.
大胆梦想,努力奋斗,保持专注。
阿根廷,以格瓦拉名言“直到最后的胜利”为名的关于格瓦拉生平的记传片在布宜诺斯艾利斯首映,4万人云集首都足球场,各国歌手纪念
The only way to change behavior is through manipulation of reinforcement contingencies.
I have often been asked how my plays come about. I cannot say. Nor can I ever explain to myself what they mean.