书籍是理解世界的钥匙。
"Books are the keys to understanding the world."
The world is what it is; men who are nothing, who allow themselves to become nothing, have no place in it.
词的体制,幽微美好,能够表达诗所不能表达的内容,但不能完全表达诗所能表达的内容。
I don't let the world change my smile.
坚持是数学研究的关键,许多伟大的成果来自于长期的奋斗。