成功绝非偶然。它是努力工作、坚持不懈、学习、研究、牺牲，最重要的是对你正在做或正在学习做的事情的热爱。

Kindness is a language which the deaf can hear and the blind can see.

Leadership means making tough decisions today that will pay off decades from now.

煤炭造就了现代世界，我们有责任确保以智慧管理它的遗产。