一本好的绘本会给读者的想象力留下成长的空间。
It's not what happens to us, but our response to what happens to us that hurts us.
动态规划理论基于最优性原理,该原理指出,无论初始状态和初始决策如何,剩余决策必须构成关于第一个决策所导致状态的最优策略。
You have to believe in yourself when no one else does.