from mouth to mouth

• 1. 口口相传: word of mouth | from mouth to mouth | andar de boca en boca
• 2. 口口相传的: word of mouth

• 1.他们在申请读博时就设计出了这款搜索引擎；它在性能上击败了当时其他所有的同类，因此无需任何广告宣传，仅仅通过最先试用的用户的口口相传就广泛应用开来，甚至最后连祖母辈也开始使用。
  They were both Ph.D. candidates when they devised the search engine which was better than the rest and, without any marketing, spread by word of mouth from early adopters to, eventually, your grandmother.
  dict.yoduao.com
• 2.它靠口口相传来销售产品。
  It sells its products by word of mouth.
  dict.yoduao.com
• 3.最开始的时候，信息是通过口口相传的。
  At the very beginning, information spread by word of mouth.
  dict.yoduao.com

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