一句话,先是太胆小,明知错的事却不敢不做;后来也还是太胆小,明知对的事却不敢去做。
"I believe in the power of books to change lives."
"Life is a series of moments, and it's up to us to make the most of each one."
数学研究是所有自然现象精确知识不可或缺的基础。