He flunked mathematics and physics.

他的数学和物理不及格。

The teacher flunked John for the exam.

老师判定约翰的考试不通过。

If you fail too many courses in college, you will flunk out.

如果你在大学里挂科太多是会被退学的。

I flunked math in second grade.

我二年级时数学不及格

If he doesn't find a solution to his problem soon, he'll surely flunk out of college.

如果他不能很快找到解决问题的办法，他肯定要被学院退学。

If he is no good, flunk him.

如果他表现不好，给他不及格。

I am going to flunk that exam.

那次考试我不及格。

You're going to flunk if you don't study.

如果你不学习你会不及格的。

LL: I said you are going to flunk the students.

噢！ flunk就是给他们不及格分数啊，那你还真说对了。