我从不买任何东西，除非我能给出一个充分的理由，说明为什么我认为它会涨。
I never buy anything unless I can give a good reason why I think it will go up.
What is necessary to change a person is to change his awareness of himself.
人需要困扰，困扰是心理健康的必需之物。
孔子说：“天冷时，才知道松柏最后凋谢。”
Technological innovation in mining isn't about replacing people, but about making their jobs safer and more productive.
质量不是一种行为，而是一种习惯。