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。
失去一个父母可能被视为不幸;失去两个则看起来像是粗心大意。
The book is a mirror: if an ape looks into it, an apostle is unlikely to look out.
We have a responsibility to future generations to leave the planet in better shape than we found it.
种一棵树最好的时间是20年前,第二好的时间是现在。