年轻人欢快地跳舞 Young people dancing cheerfully

年轻人站在那里看着镜头，背景中其他男孩和女孩欢快地跳舞，突然前面的男孩开始激烈地跳舞。

Young man standing looking towards the camera, and in the background other boys and girls dancing cheerfully, when suddenly the boy in front begins to dance intensely.