当目标是真正改变时，协作胜过竞争。
Collaboration beats competition when the goal is to make a real difference.
理论与其说是错误的，不如说是不完整的。
Innovation in mining technology isn't an option—it's an obligation we owe to both our workers and the environment.
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.
简单的生活是高层次的思考。