I don't even know what oral expression means or how to modify it. Ask the tutor, and the teacher will say, "Don't you know? Find it yourself. " Please teach me. Thank you.

I don't know the concept of oral expression and I can't change it. I didn't consult my tutor. I hereby consult the sages and thank them sincerely.

The above is the problem of turning your spoken language into written language, that is to say. Change according to this feeling.