Para.3 2.But,they do not bring happiness,because their positive effects end when the fun ends. 译文: 但它们并不能带来幸福,因为活动结束时,它们的积极 效果也会随之消失。2. But, they do not bring happiness, because their positive effects end when the fun ends. Para. 3 译文: 但它们并不能带来幸福,因为活动结束时,它们的积极 效果也会随之消失