n. 四十五口径的手枪, 每分钟四十五次转速的唱片
英汉词典

forty-five的短语、例句：

forty-five (also 45), n small record that is designed to be played on a record-player at 45 revolutions a minute （每分钟45转的）小唱片. For the uses of forty and fortieth see the examples at fifty, five and fifth. 关於forty和fortieth的用法见fifty、 five和fifth词条中的示例.