Only you turn your complaints of environments into the strength to strive for the better is the guarantee of success., 你是微笑的天使，播洒快乐的种子；你是幸福的源泉，传递幸运的音符；你是知心的朋友，酝酿永恒的友谊。亲爱的朋友，世界微笑日，保持甜美的微笑，让每一天都因你而开心快乐！