译文：假如让青春年华虚度，到年老时只能悔恨不已。赏析：人生短暂，年华易逝，我们要珍惜每天的日子，不要蹉跎岁月。
Quality is more important than quantity. One home run is much better than two doubles.
The core of the energy revolution is cleanliness and efficiency, and the coal industry must actively adapt to this trend.