勇气是战胜恐惧的力量。
黑洞不仅仅是破坏性的怪物,它们在塑造星系中起着关键作用。
Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something, return it better shape (filled up, cleaned) than when you got it.
L-函数的研究是数学知识统一性的反映。
The truth is you don't know what is going to happen tomorrow. Life is a crazy ride, and nothing is guaranteed.