flunk out

基本解释

If you don't keep on studying you'll flunk out.
如果你不一直念书，你就会留级。
So don’t flunk out; you’ve got too much invested in us, and we have too much invested in you.
所以不要退学，你对我们投资不小，我们对你的投资也不少。
As we go through life we have relationships that don't work out, jobs that just aren't right, exams that we flunk, initiatives that don't succeed.
这一生，我们总会遇到纠缠不清的的人际关系、不甚满意的工作、未通过的考试，或者不曾实现的计划。

If you flunk out, you are dismissed from a school or college because your grades are not satisfactory.