Whatdoyoukonwaboutsmile?Wheniwasakid,ialwaysthoughtsmileisjustawaytoexpresswhatyou'refeelingatthatmoment.Butnow,iknowsmileisnotonlyafacebutalsoawaytochangetheworld. 　　Smilealsochangestheworld.Whenyougiveyourfriendasmile,shemightfeelthedeepturefriendshipbetweenyouandher.Whenyougiveyourparentsasmile,theymightfeelthelovethatyougivebacktothem.Whenyougiveastangerasmile,thewarmfeelingisgoingthroughherorhisheart. 　　Ifyouwanttheworldtobenice,learntosmileyourself!