Efficiency is highly overrated； Goofing off is highly underrated. Regularly scheduled sabbaths， sabbaticals， vacations， breaks， aimless walks and time off are essential for top performance of any kind. The best work ethic requires a good rest ethic.

煤炭的未来取决于我们创新和减少其环境影响的能力。

生活若无波折险阻，就会过于平淡无奇。

Nothing can be created out of nothing.

Efficiency in mining isn't just about cost-cutting; it's about maximizing value while minimizing waste.