出自汉·桓宽《盐铁论·殊路》。镂：雕刻。如果没有内在的工夫，而只学习其表面，即使有再好的老师和朋友，也还是如同在油脂上作画、在冰上雕刻一样，只是浪费时间和功夫。

Leadership in the coal industry today means navigating the delicate balance between economic necessity and environmental responsibility.

Fear bound your heart and hope to release your heart.

Don't wait for permission to make a difference.

程序最重要的属性是它是否实现了用户的意图。