数学证明不仅仅是验证,而是一个揭示更深层次真理的故事。
I am so clever that sometimes I don’t understand a single word of what I am saying.
Human kindness has never weakened the stamina or softened the fiber of a free people. A nation does not have to be cruel to be tough.
不要让任何人告诉你你做不到某件事。