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1·The cause of the fire is not yet known.

火灾的原因尚不清楚。《牛津词典》

2·It had been the cause of much emotional upset.

那便是使人情绪一落千丈的原因。《牛津词典》

3·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。《牛津词典》

4·An inquest was held to discover the cause of death.

对死亡原因进行了调查。《牛津词典》

5·They worked together to advance the cause of democracy.

他们合力推动民主事业。《牛津词典》

6·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。《柯林斯英汉双解大词典》

7·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？《牛津词典》

8·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。《柯林斯英汉双解大词典》

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

已展开调查以确定事故原因。《牛津词典》

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

警方仍在努力确定事故的原因。《牛津词典》