世界充满了奇迹,但当我们分享它们时,它们变得更加奇妙。
你必须相信这个过程并相信自己。
煤炭开采的创新不仅仅是关于开采,而是更智能、更安全、对环境的影响更小。
The task of the teacher is to lead the student from the known to the unknown.