行为由当前刺激情境和过去的强化历史决定。
The quality of a country's institutions is the single most important determinant of its long-term economic performance.
I always believe if you’re stuck in a hole and maybe things aren’t going well you will come out stronger.
事实是，我们都在试图弄清楚如何生活。
Happiness depends upon ourselves.
我不是商人，我就是生意本身。
"I’m a very positive thinker, and I think that is what helps me the most in difficult moments."