最糟糕的失明是不愿看见的人的失明。
可持续发展不是一种选择,而是生存的必要条件。
The principle goal of education in the schools should be creating men and women who are capable of doing new things, not simply repeating what other generations have done.
时间没有分界线来标记它的流逝,从不会有雷暴或号角声宣告新的月份或年份的开始。