n.

the subject matter of a conversation or discussion

"his letters were always on the theme of love"

同義詞：subjecttopic

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

"it was the usual `boy gets girl' theme"

同義詞：motif

(music) melodic subject of a musical composition

"the theme is announced in the first measures"

同義詞：melodic thememusical themeidea

an essay (especially one written as an assignment)

同義詞：compositionpaperreport

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

同義詞：rootroot wordbasestemradical

Themes and variations on ubiquitylation.
Molecular themes in oncogenesis.
Common themes in microbial pathogenicity revisited.
Bird song: Biological themes and variations, 2nd ed.
Bishop, J. M.. Molecular themes in oncogenesis. Cell 64: 235-248
Birdsong and human speech: common themes and mechanisms.
Ubiquitin and proteasomes: Themes and variations on ubiquitylation
Framework and review of emerging themes managing knowledge in organizations: An integrative framework and review of emerging themes
Qualitative data analysis for health services research: developing taxonomy, themes, and theory
Managing Knowledge in Organizations: An Integrative Framework and Review of Emerging Themes.