Advertising is, actually, a simple phenomenon in terms of economics. It is merely a substitute for a personal sales force - an extension, if you will, of the merchant who cries aloud his wares.
从经济学的角度来看,广告实际上是一个简单的现象。它只是一种个人销售力量的替代品——如果你愿意,可以说是大声叫卖商品的商人的延伸。
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Simple
Personal
Advertising