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。
Nothing is necessarily gained by forcing students to learn geometry at a graffitied desk stuck with generations of discarded chewing gum.
强迫学生在满是涂鸦和几代人丢弃的口香糖的课桌上学习几何，未必能带来任何好处。
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。