sullen mood造句怎么写

The melancholy of young women in literature and art and the fickleness of young men in sullen mood often undergo unexpected reversals through chemical reactions, and thus turn into a cheerful and lively situation of loving life.

"I know it's hard," she said, catching my sullen mood.

Is it a perfect personality or a sullen mood to hide the boiling blood of one's attempt to be intimate with others by refusing to be cold for thousands of miles?