植物油作为发动机燃料的使用在今天看来可能微不足道,但这些油或许会随着时间的推移变得像石油和煤焦油产品一样重要。
我的梦想是成为一个好演员,我一直在努力。
The ultimate test of any economic theory is whether it improves real-world decisions.
If you have a good idea, and if you do it right, it will just go.
"The art of biography is the art of empathy."