Fear, uncertainty and doubt (FUD) is a tactic of rhetoric and fallacy used in sales, marketing, public relations,[1][2] politics and propaganda.是什么意思_Fear, uncertainty and doubt (FUD) is a tactic of rhetoric and fallacy used in sales, marketing, public relations,[1][2] politics and propaganda.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句