n. 主题（theme的复数）；布景主题；桌面主题

n the subject matter of a conversation or discussion

n a unifying idea that is a recurrent element in literary or artistic work

n (music) melodic subject of a musical composition

n an essay (especially one written as an assignment)

n (linguistics) the form of a word after all affixes are removed

v provide with a particular theme or motive