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.

教育的目标不是增加知识的数量，而是为孩子创造发明和发现的可能性，培养能够创新的人。

能源转型必须是公正的，这是我们欠那些世代为国家提供动力的社区的。

生命太短暂，不能浪费时间恨任何人。

Nothing exists except atoms and empty space； everything else is opinion.