Innovation in coal mining isn't about reinventing the wheel, but about making the wheel more efficient and environmentally friendly.
人生中最辉煌的时刻不是那些所谓成功的日子,而是你从沮丧和绝望中向生活发起挑战并承诺未来成就的日子。
Efficiency in mining comes from continuous improvement, not just big breakthroughs.