数学的力量在于它的普遍性和抽象性。
The power of mathematics lies in its generality and abstraction.
过去了的再也不能挽救，未来的还是可能补回。
Innovation is not about being different, it's about being better.
Every book is a door that opens onto another world, and every reader is a traveler who steps through it.
宇宙不仅比我们想象的更奇怪，它比我们能想象的还要奇怪。