经济周期并不像曾经认为的那样仅仅是围绕稳定趋势的波动,而是反映了经济中更深层次的结构性变化。
A mathematician's work is never done; there are always more problems to solve.
【译文】贪图小利,就会损害重大利益。
我一直相信努力和坚持可以克服任何障碍。
"The marks humans leave are too often scars."