1.[i][t]失败；未能（做到）to not be successful in achieving sth
Many diets fail because they are boring.许多规定饮食因单调乏味都不奏效。
a failing school一所失败的学校
I failed in my attempt to persuade her.我未能说服她。
She failed to get into art college.她未能进入艺术学院。
The song can't fail to be a hit(= definitely will be a hit) .这首歌不可能不流行起来。
2.[i]未做；未履行（某事）to not do sth
He failed to keep the appointment.他未履约。
She never fails to email every week.每周她必定发电子邮件。
I fail to see(= I don't understand) why you won't even give it a try.我不懂为什么你连试一试都不愿意。
He felt he would be failing in his duty if he did not report it.他认为如果不报告就是他失职。
3.[t][i]不及格；评定不及格to not pass a test or an exam; to decide that sb/sth has not passed a test or an exam
He failed his driving test.他驾驶执照考试不及格。
She was disqualified after failing a drugs test.她药检未通过，被取消了资格。
What will you do if you fail?如果你考试失败打算干什么？
The examiners failed over half the candidates.主考人员评定，半数以上考生不及格。
4.[i]出故障；失灵to stop working
The brakes on my bike failed half way down the hill.我的自行车下山至中途车闸失灵了。
5.[i]衰退to become weak
Her eyesight is failing.她的视力日渐衰退。
His last months in office were marred by failing health.由于健康恶化，他最后几个月的公职工作受到了影响。
6.[t]~ sb使失望；有负于；无能为力to disappoint sb; to be unable to help when needed
When he lost his job, he felt he had failed his family.他失去工作以后，感到辜负了家庭。
She tried to be brave, but her courage failed her.她想勇敢，但却鼓不起勇气。
Words fail me(= I cannot express how I feel) .我无法表达自己的感受。
7.[i]不足；缺乏to not be enough when needed or expected
The crops failed again last summer.上个夏季庄稼又歉收了。
The rains had failed and the rivers were dry.雨量不足，河流干涸。
8.[i]倒闭；破产to be unable to continue
Several banks failed during the recession.经济衰退期间有几家银行倒闭了。
If all else fails, you can always sell your motorbike.如果所有别的办法都不行，你总还可以卖掉摩托车。
If all else fails, you can always sell your motorbike.如果所有别的办法都不行，你总还可以卖掉摩托车。
1.（考试）不及格the result of an exam in which a person is not successful
I got three passes and one fail.我考试三门及格，一门不及格。
I want you here by two o'clock without fail.我要你两点钟务必来到这里。
He emails every week without fail.他每周必定发电子邮件。
I want you here by two o'clock without fail.我要你两点钟务必来到这里。
He emails every week without fail.他每周必定发电子邮件。
And if you've done everything In your power , and still "fail" -- The truth of the matter is That you haven't failed at all.
而且如果你已经做每件事物在你的支配下，和静止的“不及格”--物质的事实是你一点也还没有失败。
He said that under normal circumstances he would be willing to see struggling companies fail.
他说，在正常情况下，他会愿意看到陷入困境的公司垮掉。
When the assertions fail, it becomes very important to provide error messages that are easy to understand.
当断言失败时，非常有必要提供易于理解的错误消息。
Robertson said sperm was more likely to fail if the woman had not previously been exposed to that man's semen for at least three months.
罗伯逊说，如果女方事先接触男方精液的时间达不到至少三个月，那么男方精子不能致孕的可能性更大。
When new technology ventures fail, it tends to be as units of large corporations, rather than as standalone companies.
当新技术风险企业失败时，往往是作为大企业的子公司，而不是作为独立的公司。
Unfortunately, this required rescuing many companies considered "too big to fail" that individually did not deserve to be saved.
遗憾的是，这需要对许多被认为“规模太大而不能倒”的公司进行纾困，就单个公司而言，它们并不值得挽救。
It is no doubt true that many fail to understand the details of Tibetan history.
无疑，很多人并不了解西藏历史详情。
it is much safer for a prince to be feared than loved loved, if he is to fail in one of the two.
如果他二者只能取其一，那么对一个君王而言，被人害怕比被人喜爱更安全。
He was not such a fool as to fail to see that point.
他并不是连那一点都看不出来的傻瓜。
The world looks to you today with regard to Geneva. I believe it would be a grave mistake and a blow to peace if it were allowed to fail.
我相信，如果会判破裂的话，那将会是一个严重的错误，也是对和平的巨大冲击。
Two out of every three black marriages fail, about twice the rate of white marriages.
有三分之二的黑人婚姻最终告以破裂，其离婚率是白人的两倍。
A second alarm bell rings when you fail in trying to reuse an apparently reusable piece of code.
第二个报警电铃环中重用段显然可重用代码尝试失败时。
But in its final creation it was not the part of the Father's power to fail as though exhausted.
然而，在其创造的最后阶段，我们在天之父的力量不可能衰竭不济。
Muddling through by trying to resurrect a failed banking system, which will likely fail again, is not the answer.
试着救活已经失败并很可能再次失败的金融系统，这样胡乱应对的方案是行不通的。
And you know that even in the best marriages and romantic relationships, we sometimes fail to tell the truth.
而你也清楚，即便是最美好的婚姻，最浪漫的两性关系，我们有时候也无法说实话。
If the commission and Mr Van Rompuy fail to press these points, they will be dancing around the heart of the matter.
如果委员会和范龙佩先生没有踩到这些点，那他们就始终是在核心问题周边徘徊。
Suddenly, I began to question the impossible. Maybe I might fail, but what's the point in not trying?
突然之间，我开始探寻不可能的事。我可能会失败，但是如果不去尝试又有何意义呢？
But she says politicians generally fail to live up to their promises, and the European Union overall seems unable to agree on anything.
但是她说，政治家通常都不能兑现他们的诺言，而且整个欧盟似乎都无法就任何事情达成一致。
The stirring up of these lugubrious ideas did not cause his courage to fail, but his brain grow weary.
那么多愁惨的想法在心里起伏，他的勇气并不减少，但是他的脑子疲乏了。
Historically, they fail to see that private land ownership is refutable and that collective land ownership can work well.
在历史层面，他们没有看到土地私有制度是可以证伪的，没有看到土地集体所有也可以发展得很好。
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