Truth is eternal and unchanging.

"Memory can make a thing seem to have been much more than it was."

The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.

The only thing necessary for the triumph of evil is for good men to do nothing.

Energy security is a cornerstone of national strategic security, and we must firmly hold our energy饭碗 in our own hands.

真相很少纯粹，也绝不简单。