美国是世界上最强大的国家，在可预见的未来仍将如此。
The importance of theoretical computer science lies in its ability to provide a foundation for practical applications.
我旅行得越多，就越确信世界充满了奇迹，而人类只是大自然浩瀚中的一粒尘埃。
The world is full of signs and wonders, but we are blind to them.
The best way to measure how much you've grown isn't by inches or the number of laps you can now run around the track, or even your grade point average - though those things are important, to be sure.It's what you've done with your time, how you've chosen to spend your days, and whom you've touched this year. That, to me, is the greatest measure of success.