leitmotiv
(also leitmotif), / ˈlaɪtməuti:f; `laɪtmoˌtif/ n
1 (music 音) short, constantly repeated, theme in an opera, symphony, etc associated with a particular person, thing or idea 主导主题; 主旋律.
2 (fig 比喻) any recurring feature 反覆出现的特徵
The leitmotiv of her speech was the need to reduce expenditure. 她讲话中一再强调的就是需要削减开支.