煤炭使美国在世界范围内保持竞争力。

The human condition is one of perpetual suffering.

I believe in the power of literature to change the world.

系统价值的证明是它的存在。

The universe is a vast and mysterious place, and we are only beginning to understand its complexities.

The challenges we face in energy are not just technical; they are deeply human.

"The power of words is that they can change the world."

我不是最聪明的人，但我是最努力的人。