This belt was the most salient thing about him. It advertised his callowness—a callowness sheer and unutterable.

这条皮带是他浑身上下最惹眼的东西，让人一看便知道他是个嫩小子，真的是太嫩了。

On the other hand, he sees a callow youth and addresses himself to the obvious callowness, and thereby makes himself thoroughly disliked.

另一方面，他看到了一个幼稚的年轻人， 并向明显的幼稚说起自己， 从而使自己彻底不受欢迎。