Science is not just about facts; it's about asking the right questions.
思考是最艰难的工作,这可能是为什么如此少的人从事它。
Our greatest natural resource is the minds of our children.
"A man's memory might have only a hundred clear days in it and he has lived thousands."
天下的事情有难易之分吗?只要去做,难的也会变容易;不去做,容易的也会变难