我们必须超越当前的技术，以满足未来的能源需求。

释义：看见一片落叶，就知道一年内的时间将要到头了。通过细微的迹象，可以预料到整个形势的发展趋向与结果。

"I don't think about being the best. I think about improving every day."

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.