PHRASAL VERB (因成绩太差) 被退学If you flunk out, you are dismissed from a school or college because your grades are not satisfactory. (因成绩太差) 被退学 [mainly US, informal]
He flunked out, a school official told CNN.
一位校方官员告诉美国有线电视新闻网说,他被退学了。
If he doesn't find a solution to his problem soon, he'll surely flunk out of college.