The discovery of topological insulators has opened up a new frontier in condensed matter physics, where the interplay of symmetry and topology leads to novel quantum states of matter.

Certification standards are the compass for responsible forestry.

The uniformity of the hybrids in the first generation, the dissimilarity in the second, are facts which cannot escape the attention of an accurate observer.

If you want to make a bond, you are to take the risk of tearing.

你不需要气象员告诉你风往哪边吹。

The language of mathematics is the language of the universe, and by learning it, we can understand the cosmos.