Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal.
口香糖曾经主要是青少年男孩购买，现在却在广告中被宣传为餐后清新口气和清洁牙齿的用品。
highlights negative adolescent behavior
强调青少年的负面行为
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。