成功的真正标准不在于收获,而在于我们留下的遗产。
My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.
The best scientists are those who remain students forever.
没有孩子的民族将面临无望的未来;没有树木的国家将面临更加无望的未来。