Never frown,even when you are sad,because you never know who is falling in love with your smile.
纵然伤心,也不要愁眉不展,因为你不知是谁会爱上你的笑容.
A smile is a curve that sets a lot of things straight.微笑是一条曲线 ,它能使许多东西变直.
Better the last smile than the first laughter.
笑在前不如笑在后.