儿童不仅在心理上是被动的,而且像一个空花瓶,是一个有待于充满及塑造的生命。
We don't inherit the land from our ancestors; we borrow it from our children.
The spirit of science is the spirit of seeking truth and being pragmatic.
我们能留下的最好遗产是一个生生不息的遗产。