地球并非刚体，其对力的响应必须被视为弹性体。
The truth is I'm a real perfectionist, and I drive myself crazy.
The best ideas come from listening, not just talking.
所以我认为虽然不耕种织布，但效果好于耕种织布。
The only way to learn mathematics is to do mathematics.
The first question I ask myself when something doesn't seem to be beautiful is why do I think it's not beautiful. And very shortly you discover that there is no reason.
追求数学真理是一项既个人又普遍的努力。
The best way to predict the future is to create it.