The cause of the fire is not yet known.
火灾的原因尚不清楚。
Fire investigators have responded to the scene but have not yet determined the cause of the fire.
火灾调查人员已经对现场情况做出了回应，但还没有确定火灾的原因。
What was the cause of the fire?
火灾是怎么引起的？
Do you know the cause of the fire?
你知道火灾的原因吗？
The cause of the fire remains unclear.
火灾原因尚不清楚。
The cause of the fire was carelessness.
起火的原因是由于疏忽。
The cause of the fire is still unknown.
飞机失火原因目前仍未所知。
The cause of the fire was carelessness.
火灾的原因是疏忽。
The cause of the fire was carelessness.
起火的原因是不谨慎。
The cause of the fire was carelessness.
火灾的原因是粗心。
The cause of the fire was a cigarette end.
火灾的起因是一个烟头。
He is investigating the cause of the fire.
他正在调查这场大火的起因。
The cause of the fire was a cigarette-end.
这次火灾是由一根烟头造成的。
He attempts to decide the cause of the fire.
他试图确定起火的原因。
The cause of the fire was under investigation.
火灾的原因正在调查中。
The cause of the fire is under investigation.
起火原因正在调查之中。
The cause of the fire is under investigation.
目前火灾原因尚在调查之中。
Their probe into the cause of the fire proved futile.
他们对起火原因的调查没有任何收获。
The cause of the fire was traced to a faulty fuse-box.
起火的原因已查出是因保险丝盒中有短路。
A fireman accidentally discovered the cause of the fire.
一个消防队员偶然发现了起火的原因。
They had some trouble finding out the cause of the fire.
他们在查找起火原因时碰到了一些困难。
The firemen were in a puzzle about the cause of the fire.
消防队员对这场火灾的起因困惑不解。
We don't have, I don't have any information yet on what the cause of the fire is.
然而，我们目前还没有获得火灾起因的任何信息。
He started an inquiry into the cause of the fire, and prosecute it for three weeks.
他开始调查火灾的原因，接著调查了三个星期。
The fire was put out within half an hour and the cause of the fire was under investigation.
大火半小时内被扑灭，火灾原因正在调查中。
The fire was put out within half an hour and the cause of the fire was under investigation.
大火半小时内被扑灭，火灾原因正在调查中。
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