爱惜精神以备日后担当大任，虚度时光何以报父母之恩？

领导力意味着今天做出艰难的决定，以确保更美好的明天。

Judge a man by his questions rather than by his answers.

It is remarkable that a science which began with the consideration of games of chance should have become the most important object of human knowledge.

The core of the energy revolution is cleanliness and efficiency, and the coal industry must actively adapt to this trend.