出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第125页（229字）
形容景况、地位骤然下降或失势，例京城陷落的消息已传布市面，明日行市定当一落千丈。
The news of the fall of the capital has been spread throughout the city．Tomorrow’s stock market prices will certainly decline drastically．