1、But just like high school, many students flunk out of college because of their poor grades.
但正如高中一樣，許多大學(xué)生因成績不好而退學(xué)。

2、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決問題的辦法，他肯定要被學(xué)院退學(xué)。

3、If flunk out I can always transfer to Engineering.
一旦不合格，馬上可以轉(zhuǎn)工程專業(yè)。

flunk out翻譯