宇宙可以被理解这一事实是一个奇迹。

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.

企业的核心竞争力是人才，而不是资金或技术。