comparison ad比较广告,(新旧产品)对比广告comparisonn.比较；比喻comparison between China and USA中关比较comparison advertising intensity比较广告强度Comparison of frequency standard频标比对comparison of legislative models范式比较comparison and choice of program方案比选comparison of different versions不同版本的比较comparison among means for trend平均趋势比较comparison and selection of plan方案优选Comparison of China with Germany中、德比较Comparison of extraction process工艺比较