I think first off, you got to split what people call literature from or fine literature or something like this from like commercial literature.

首先，我认为需要将人们所称的或纯与商业区分开来。

Do Main Street and The Grapes of Wrath belong in the category of belles-lettres or are both of them sociological studies, the one concentrating on urban experiences, the other on agrarian life?

《大街》和《愤怒的葡萄》到底属于纯畴，还是都属于社会研究，注城市经验，注农村生活？

Our critical judgment in the case of expository books concerns their truth, whereas in criticizing belles-lettres, as the word itself suggests, we consider chiefly their beauty.

我们对说明性书籍的批判性判断注的是它们的真实性，而在批评纯时，正如这词本身所暗示的那样，我们主要考虑它们的美感。