It means that she is very good-looking, but in school, she is a school flower and grass class, and in the factory, she is a factory flower and grass class, so as long as she looks outstanding, both men and women can be crowned with this title.
It should not be difficult to rhyme the next sentence, such as: beautiful. Of course, good-looking is generally only used to describe boys.
Another example: I like it best. At this time, regardless of gender, it is an appearance association.