to not succeed at something
If you don't study, you might fail the test.
如果你不学习,你可能会考试不及格。
to not pass a test or exam
You will fail if you don't answer the questions correctly.
如果你不正确地回答问题,你会不及格。
to not do something you should do
He never fails to say thank you.
他从来不会忘记说谢谢。
to stop working properly
The engine might fail if not maintained.
如果不维护,发动机可能会故障。
to become weak or less effective
His health began to fail as he grew older.
随着年龄增长,他的健康开始衰退。
to disappoint someone or not help when needed
Don't fail your friends when they need you.
当朋友需要你时,不要让他们失望。
to not be enough when needed
The crops will fail if there is no rain.
如果不下雨,庄稼会歉收。
to be unable to continue operating
Many small businesses fail in their first year.
许多小企业在第一年就倒闭了。
a result of not passing a test or exam
Getting a fail means you need to try again.
得到不及格意味着你需要再试一次。
a mistake or lack of success
The project was a complete fail from the start.
这个项目从一开始就完全失败了。