Business cycles are not, as once thought, merely fluctuations around a stable trend, but rather reflect deeper structural changes in the economy.
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 is a device for turning coffee into theorems.
生活中最大的幸福是确信我们被爱；被爱是因为我们自己，或者更确切地说，尽管我们自己。