我认为最重要的是始终保持谦逊并继续努力工作。

We must mine coal responsibly today so that our children inherit both energy security and a healthy environment.

The greatest performance improvement of all is when a system goes from not working to working.

不是关于成为最好的，而是关于比昨天的自己更好。

你的20岁是你人生中最重要的十年。