"Matching methods can be a powerful tool when randomization is not possible."

自然法的最低内容对于任何社会的生存都是必要的。

Technology will redefine the future of energy, and we must lead this transformation.

子贡问怎样实现仁，孔子说：“工人要做好工，必先磨好工具。生活在那里，就要追随那里的品德高尚的领导，结交那里的仁义之士。”

Any woman who understands the problems of running a home will be nearer to understanding the problems of running a country.

在量子力学中，轨迹的概念失去了意义。