smoke-stacks'sməʊkstækCOCA³¹⁵¹¹¹⁺⁴ 基本例句 n.烟囱;烟窗;adj.低技术制造业的;大工厂的原型smoke-stack的复数 Catalytic converters on the cars and better filters on power- plant smoke-stacks have greatly reduced smog, smoke and soot in the air. 汽车的催化裂化器以及发电厂的过滤器降低了空气中的烟、雾、尘。51ielts