世界上充满了不再确定自己该感受什么——或不该感受什么的人。
The best thing a human being can do is to help another human being know more.
Mathematics is the art of giving the same name to different things.
一个值得花一年去追求的目标是,学习足够多的关于一个主题的知识,以至于你无法相信一年前的你是多么的无知。
Sustainability is no longer an option; it's a responsibility we owe to future generations.