Unit 9 Advertising
  Advertising is an important way of promotion in commercial business. What is an advertisement? Advertisements are used to send commercial information about some commodities or services to the public.
  Advertising is an important way of promotion in commercial business. What is an advertisement? Advertisements are used to send commercial information about some commodities or services to the public.
广告是商品交易中一个主要促销伎俩。