听我说，朋友，希望是件危险的事。希望能叫人发疯。
The only freedom which deserves the name is that of pursuing our own good in our way， so long as we do not attempt to deprive others of theirs or impede their efforts to obtain it.
“故事不在文字中；它在斗争中。”
互联网是我们社会的反映，它放大了好的一面，也放大了坏的一面。
科学发现的旅程充满了挑战，但也非常值得。
Write a program as carefully as you write a letter.