我们智慧的最大证明是我们能够察觉自己的局限。
The greatest proof of our intellect is our ability to perceive our own limitations.
The young do not know enough to be prudent, and therefore they attempt the impossible – and achieve it, generation after generation.
The future of coal lies in cleaner technologies and smarter resource management.
一个好计划的最大敌人是完美计划的梦想。