Every mathematical problem has a solution; it just takes time and effort to find it.
显微镜是永远不会说谎的沉默证人。
可持续性不是一种趋势;而是我们对后代的责任。
You think when you wake up in the mornin yesterday don't count. But yesterday is all that does count. What else is there? Your life is made out of the days it's made out of. Nothin else.
我们不拥有记忆;记忆拥有我们。