在确定产品或服务的目标受众后，广告公司必须为广告选择合适的媒介。
After determining the target audience for a product or service, advertising agencies must select the appropriate media for the advertisement.
广告媒介的选择广告代理商在确定产品或服务的目标受众后，必须为广告选择合适的媒介。
Media Selection for advertisements after determining the target audience for a product or service, advertising agencies must select the appropriate media for the advertisement.
广告商认为杂志是其接触目标受众的一个有效途径。
Advertisers see magazines as an efficient way of reaching target audience members.
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