可持续发展不仅需要愿景,还需要具体行动。
数学的美在于它是一种可以以其他任何方式都无法描述宇宙的语言。
在任何领域达到精通的秘诀是永远保持学习的心态。
The mind is a set of information-processing machines that were designed by natural selection to solve adaptive problems faced by our hunter-gatherer ancestors.