您可能需要花数年时间尝试不同的广告并评估结果，以确定哪些目标市场和媒体组合最适合你。
You may need to spend several years trying out various advertising options and assessing results to know which target markets and media mix work best for you.
读者持续以较快的速率增长——我们花费在媒体上的时间，约35%是在网页上——但广告收入没有跟上步伐。
The audience continued to grow at a ferocious rate -about 35 percent of all our media time is now spent on the Web -but AD dollars weren't keeping pace.
纽约哥伦比亚新闻学院的新媒体教授Sree Sreenivasan说：“问题是：报纸的广告过去以美元计，如今却以分币计。”
Sree Sreenivasan, a new media professor at Columbia Journalism School in New York, said: "The problem is that advertising dollars from newspapers are being replaced by digital pennies."
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