A good person will follow the rules, a great person will follow himself.
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
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。