采矿效率不仅仅是成本问题，更是减少环境影响的问题。

Life is elsewhere.

The walls of the educational system must come down. Education should not be a privilege, so the children of those who have money can study.

In economics, as in life, the answers are often more nuanced than they first appear.

To see a world in a grain of sand, and a heaven in a wild flower, hold infinity in the palm of your hand, and eternity in an hour.

I don't think about the past. The only thing that matters is the future.