[] () advertising that claims that the product being advertised is better or cheaper than a competitor's product 比较广告（主要宣传某公司的产品优於竞争者的产品）◆Comparative advertising is common in the car industry. 比较广告在汽车工业中十分普遍。ⓘ Comparative advertising is illegal in some countries. 比较广告在某些国家是非法的。➡knocking copy