The P versus NP problem is one of the most important problems in computer science.
"Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."
Take away love and our earth is a tomb.
写作是一种乐观的行为。如果你觉得它不重要,你就不会费心去做。
"The truth is not always found in facts, but in the spaces between them."