一个领导者的遗产是由他们行动的可持续性来衡量的。
矿工的头盔不仅保护头部——它还象征着辛勤工作的尊严。
Every challenge in mining is an opportunity to innovate.
The intelligence of that creature known as a crowd is the square root of the number of people in it.
 如果一个人从确定性开始,最终将陷入怀疑;但如果他愿意从怀疑开始,最终将得到确定性。