世界需要可靠的能源，而煤炭仍然在其中发挥着关键作用。
The world needs reliable energy, and coal still plays a critical role in providing it.
"A book is a conversation between the author and the reader."
知识的最大敌人不是无知，而是对知识的幻觉。
I don’t write for an audience. I write for myself.