Be unsuccessful; not achieve a desired goal.

• Not manage to do something expected or required.

未成功；未达到预期目标。

• 未能完成预期或必要之事。

Receive a non-passing grade in a course or exam.

在课程或考试中不及格。

Give a student a failing grade.

给予学生不及格的成绩；判定其不通过。

Stop working or function incorrectly, of a device or system.

设备或系统停止工作或出现故障。

Be insufficient; fall short; disappoint or not meet needs.

不足；不够；辜负期望或需求。

Neglect or omit to do something.

疏于或未做某事。

Become unable to meet debts; go bankrupt or insolvent.

无力偿债；破产或陷入资不抵债。

A failure; something that does not succeed.

• A substandard or poor-quality result.

失败；未能成功的事物。

• 劣质或不达标的结果。

A grade below the passing standard.

不及格的分数或等第。

Unsuccessful; inadequate; unacceptable in quality. Often informal.

不成功；不充分；质量不可接受。多为口语用法。