The beauty of instrumental variables is that they allow us to see the world in a new light.

"I'm in love with you, and I'm not in the business of denying myself the simple pleasure of saying true things."

伟大的品牌建立在诚信和兑现承诺之上。

守住嘴巴，就跟拴紧瓶口一样。克制欲望，就像防守城池一般。

创新是煤炭行业未来的关键，我们必须拥抱新技术和新理念。