定义就是限制。
I don't believe in happy endings, I believe in necessary endings.
自由是上帝赐予的权利。
The beauty of mathematics lies in its ability to describe the world in a precise and elegant way.
质量不是承诺;它是一种结果。
It is vain to talk of the interest of the community, without understanding what is the interest of the individual.
拯救犀牛的唯一方法是拯救它所生活的环境,因为它与数百万其他动植物物种之间存在相互依赖关系。