Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work.

煤炭行业是美国能源独立的支柱，已经持续了几代人。

Leadership means making tough decisions today for a better tomorrow.

The more you know, the less you understand.

科学是关于在知识和技术上突破界限。

解释：不可因为个人喜欢而滥赏，不可因为个人恼怒而诛杀。