If you want to see what this nation is all about, you have to ride the rails. Look outside as you speed through, and you’ll find the true face of America.

量子力学的美在于它能够描述最小尺度下粒子的行为，即使它违背了我们的经典直觉。

"The past is a foreign country; they do things differently there."

The greatest glory in living lies not in never falling, but in rising every time we fall.

If you aren't in over your head, how do you know how tall you are?