统计学家的目标是从样本中推断出总体是什么。

A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales.

永远不要让成功冲昏头脑，也不要让失败打击你的信心。

There is no perfection only life.

煤炭企业在追求经济效益的同时必须履行社会责任。

The best leaders are those who create more leaders, not more followers.

可持续的基础设施应该平衡经济、社会和环境的效益。