There is a time for daring,and there is a time for caution, and a wise man understanding which is called for

To be fond of dancing was a certain step towards falling in love.

解释：评价一个人时，不能因为一点过失就抹杀他的功劳。

Every story has an end, but in life every ending is just a new beginning.

计算复杂性理论的发展向我们展示了并非所有问题都是平等的。

梦想需要勇气，更需要行动。