The cause of the fire is not yet known.
火灾的原因尚不清楚。
What was the cause of the fire?
火灾是怎么引起的？
The cause of the fire in unknown.
这场火灾的起因还不知道。
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 is carelessness.
这场火灾是粗心引起的。
The cause of the fire was carelessness.
起火的原因是由于疏忽。
The cause of the fire was carelessness.
火灾的原因是疏忽。
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.
起火的原因是不谨慎。
The cause of the fire was carelessness.
火灾的原因是粗心。
Thee cause of the fire was carelessness.
这次火灾是由于粗心引起的。
The cause of the fire was under investigation.
火灾的原因正在调查中。
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 is investigating the cause of the fire.
他正在调查这场大火的原因。
He attempts to decide the cause of the fire.
他试图确定起火的原因。
The cause of the fire is being investigated.
起火原因正在调查中。
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。
They don't know much about the cause of the fire.
他们对火灾的原因了解的不多。
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。
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。
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