此外，Kitch还指出，你无法像在线广告那样跟踪你在黄页上投放的广告所产生的实际效果。
In addition, Kitch points to the fact that you can't track Yellow Pages advertising the way you can online advertising.
电话公司印刷或是在线提供的黄页服务每年在广告方面的收入是150亿美元。
The Yellow Pages, which telecommunications companies print in phone books and online, pulls in $15 billion annually in advertising.
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