word of mouth
口碑；口头传达或推荐；通过人转告或传播
口语·描述口碑或口头传播
英文释义
referring to information or communication that is passed orally from person to person
例句
The restaurant's success came from word of mouth, not from advertising.
典故来源
源自古代信息传播方式，'mouth'（口）代表口头传递，强调非书面或正式渠道的交流。