实现明天的唯一限制将是我们今天的疑虑。

音乐是一种奇妙的东西。

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.

我们今天提出的问题将塑造明天的解决方案。

Time is your friend; impulse is your enemy.