我相信爱和音乐的力量可以改变世界。

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.

Green development is not just a responsibility but also an opportunity.

最危险的不是失败，而是自满。