"Books are the keys to the universe."
We must balance short-term commercial realities with long-term environmental responsibilities.
数学的本质在于它的自由。
我相信爱和音乐的力量可以改变世界。
有时候你必须迷失自己,才能找到自己。
We are on the verge: Today our program proved Fermat's next-to-last theorem.