belles-lettres
noun [uncountable + singular or plural verb] (from French, old-fashioned)studies or writings on the subject of literature or art, contrasted with those on technical or scientific subjects 纯文学,美文学,美文(指有别于科技题材的文学或艺术研究或作品) Word Originmid 17th cent.: from French, literally ‘fine letters’.