The core of the energy revolution is cleanliness and efficiency, and the coal industry must actively adapt to this trend.
自由确实珍贵;如此珍贵以至于必须谨慎配给。
"I think that we communicate only too well, in our silence, in what is unsaid."
目前生活中最悲哀的方面是,科学收集知识的速度比社会收集智慧的速度快。