The best time to plant a tree was 20 years ago; the second-best time is now.
The strength of a company lies in its people; invest in them, and they will build the future.
你无法改变周围的人,但你可以选择与谁为伍。
我们从这样的假设开始:任何学科都可以以某种智力上诚实的形式有效地教给处于任何发展阶段的任何孩子。
"The pursuit of science is not just a profession, but a way of life."