实现明天理想的唯一障碍是今天的疑虑。

光波，无论是以太波还是其他波，在所有情况下都是时间上的周期性过程。

In computer science, we stand on the shoulders of giants, but we must also be willing to question their assumptions.

从那天开始，如果我要去哪里，我就跑着去。

In all affairs， it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.

在充满仇恨的世界里，爱才是最大的勇气。