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.
压力是一种特权。
写作是理解我们梦想的一种方式。
自然的和谐不是静态的平衡,而是相互依存的动态之舞。
The best mathematics is not just rigorous; it is also elegant.