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1·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。《柯林斯英汉双解大词典》

2·If you don't keep on studying you'll flunk out.

如果你不一直念书，你就会留级。

3·If flunk out I can always transfer to Engineering.

一旦不合格，马上可以转工程专业。

4·If you just loaf around in college, you will flunk out.

如果你在大学里无所事事，你会被踢出去。

5·They didn't flunk out, but their records weren't so hot.

他们勃没有不及格，但成绩不太好。

6·About 5 percent of students in the language program flunk out before their freshman year.

参加英语语言课程大约5%的学生会在上大一之前退学。

7·But just like high school, many students flunk out of college because of their poor grades.

但正如高中一样，许多大学生因成绩不好而退学。

8·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。