相关系数的可能误差不是可以从第一原理推导出来的东西,而是必须通过经验找到的。
Profitability and sustainability are not opposites; they are two sides of the same coin. A business that harms the environment ultimately harms itself.
【释义】:骄傲不应过度,欲望不能放纵,享乐不能极端,志向不宜自满。