The cause of the fire is not yet known.

火灾的原因尚不清楚。

The immediate cause of death is unknown.

造成死亡的直接原因不明。

Unemployment is a major cause of poverty.

失业是贫困的主要原因。

Unemployment was the chief cause of poverty.

失业是贫穷的主要原因。

She was the unwitting cause of the argument.

她无意中引起了这场争执。

It had been the cause of much emotional upset.

那便是使人情绪一落千丈的原因。

Faulty wiring is the major cause of house fires.

错误的供电线路是房屋火灾的主要原因。

The cause of the crash was given as engine failure.

撞车事故的原因被认定是发动机故障。

Money is a major cause of strife in many marriages.

钱在许多婚姻中是导致冲突的一个主要原因。

An inquest was held to discover the cause of death.

对死亡原因进行了调查。

An old bed is the most likely cause of back trouble.

旧床最有可能导致背部疾病。

The cause of the accident was not immediately apparent.

这次事故的起因并非即刻可明。

They worked together to advance the cause of democracy.

他们合力推动民主事业。

He was the unknowing cause of all the misunderstanding.

他无意中引起了这一切误会。

He worked tirelessly for the cause of health and safety.

他为健康和安全事业孜孜不倦地工作。

Premature birth is the main cause of perinatal mortality.

早产是围产期死亡的主要原因。

Oil pollution is the most common cause of death for seabirds.

石油污染是海鸟死亡的最常见的原因。

Have you any comment to make about the cause of the disaster?

你对发生灾难的原因有何评论？

An inquiry was set up to determine the cause of the accident.

已展开调查以确定事故原因。

She had taken up the cause of a generation of American youth.

她已经开始着手一代美国年轻人的事业。

Smoking is the biggest preventable cause of death and disease.

吸烟是造成不必要疾病和死亡的最大原因。

Police are still trying to establish the cause of the accident.

警方仍在努力确定事故的原因。

The results implicate poor hygiene as one cause of the outbreak.

这些结果说明卫生条件差是疾病流行的一个原因。

Unemployment may be an underlying cause of the rising crime rate.

失业可能是犯罪率攀升的潜在原因。

They refuse to do anything about the real cause of crime: poverty.

他们拒绝采取任何行动解决引发犯罪的真正原因：贫困。

One cause of the artist's suicide seems to have been chronic poverty.

那位艺术家自杀的原因之一好像是极度贫困。

Accidents are still the number one cause of premature death for Americans.

事故仍然是美国人非自然死亡的首要原因。

The newspapers provided little enlightenment about the cause of the accident.

报章对事故原因并未解释清楚。

His misunderstanding of language was the primary cause of his other problems.

他对语言的误解是他其他问题的主要原因。

Pilot error, to wit failure to follow procedures, was the cause of the accident.

飞行员的失误，即没有遵守操作程序，是事故的原因。