创新是经济增长的关键驱动力,我们必须创造培育创新的环境。
The act of writing is an act of optimism.
【释义】人穷的时候不能丧失道德的标准,而发达的时候也不能背弃自己做人的原则。
布莱克-斯科尔斯公式的美妙之处在于它仅依赖于一个不可观测的参数,即股票的波动率。
Time present and time past are both perhaps present in time future, and time future contained in time past.