"A book is a gift you can open again and again."
你在有限的日子里给了我一个永恒。
幸福不是现成的东西，它来自于你自己的行动。
拓扑绝缘体的美在于它们的鲁棒性；它们的表面态受到保护，不受无序和缺陷的影响。
The best brands don't just sell products; they sell emotions and experiences.
The best way to learn is to teach.
The world is the totality of facts, not of things.