STUDENT: PROFESSOR: Oh, I'm sorry. So it's n minus l minus 1.

学生：,教授：不好意思，这是n减去l减去1．

youdao

STUDENT: PROFESSOR: Oh, I'm sorry. So it's n minus l minus 1.

学生：,教授：不好意思，这是n减去l减去1．

youdao