flunk a test 考试不及格
flunk a class 一门课挂科
flunk out 被开除（因成绩差）
flunk an exam 考试挂掉
keep flunking 一直不及格
1. He is flunking his math class because he doesn't study hard.
他数学课不及格，因为他不努力学习。
2. I'm afraid I'm flunking this driving test.
我担心我会挂掉这个驾照考试。
3. She spent all night studying to avoid flunking the final exam.
她整晚都在学习，以避免期末考试成绩不及格。
A: Did you pass the chemistry exam?
A：你化学考试通过了吗？
B: No, I think I'm flunking it. I didn't understand the questions at all.
B：没有，我觉得我要不及格了。我完全没看懂那些问题。
1) 考试不及格
2) 未能达到标准
3) 失败、落第
1. (informal) 不及格；失败（尤指考试）
e.g. He flunked the entrance exam.
他入学考试不及格。
verb
1. (informal) to fail to reach a required standard, especially in an examination.
Synonym: failing, failing to pass