Letters are the biographer's gold mine; they reveal what official records conceal.

可持续性不是成本，而是对我们未来的投资。

Innovation in mining is not an option; it's a necessity for survival.

领导力意味着今天做出艰难的决定，为未来的几代人带来利益。

"I don't think about the past. The only thing that matters is the everlasting present."

"The heart is a fragile thing, but it is also the strongest part of us."