煤炭企业要增强社会责任感，实现经济效益与社会效益的统一。
Coal enterprises must enhance their sense of social responsibility and achieve the unity of economic and social benefits.
The great tragedy of Science—the slaying of a beautiful hypothesis by an ugly fact.
To speak ill of others is a dishonest way of praising ourselves.
I’m a very positive thinker, and I think that is what helps me the most in difficult moments.
逻辑学研究不仅仅是关于推理规则，而是关于推理本身的本质。