The cause of the fire is not yet known.
火灾的原因尚不清楚。
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。
The cause of the fire was under investigation.
火灾的原因正在调查中。
The fire department did not immediately comment on the suspected cause of the blaze.
消防部门未立即就火灾的可能原因置评。
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。
First, burning firecrackers is a potential cause of fire accidents, especially in the big city.
首先，放鞭炮是火灾事故潜在的原因，特别是在大城市。
The cause of the fire was carelessness.
起火的原因是由于疏忽。
Do you know the cause of the fire?
你知道火灾的原因吗？
They are trying to find out the reason (or cause) of the terrible fire.
他们正在努力查寻那次可怕的火灾的原因。
They are trying to find out the reason (or cause) of the terrible fire.
他们反正在勤奋查觅那次可怕的火灾的缘由。
He attempts to decide the cause of the fire.
他试图确定起火的原因。
What was the cause of the fire?
火灾是怎么引起的？
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 most important natural cause of fire is lighting.
自然界最主要的引火物质是闪电。
A disastrous fire in the city cause loss of life and money.
城里一场灾难性的火灾造成生命财产的损失。
The cause of the fire is under investigation.
起火原因正在调查之中。
The cause of the fire was a cigarette end.
火灾的起因是一个烟头。
The cause of the fire remains unclear.
火灾原因尚不清楚。
The cause of the fire was carelessness.
起火的原因是不谨慎。
The cause of the fire was carelessness.
火灾的原因是粗心。
The cause of the fire is under investigation.
目前火灾原因尚在调查之中。
Fire officers are still trying to DETECT the cause of the fire.
消防官兵仍在查究起火的原因。
Carelessness is the usual cause of fire.
疏忽大意通常是火灾的起因。
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。
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。
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