阳光下肆无忌惮的嘲笑阳光下歇斯底里的轻笑
[yáng guāng xià sì wú jì dàn de cháo xiào yáng guāng xià xiē sī dĭ lĭ de qīng xiào]
Describes two contrasting emotional expressions under the sun—unrestrained mockery and hysterical laughter, suggesting conflicting emotions of cynicism and amusement co-existing in daily life.