人们猜测引起火灾的原因可能有人把烟头丢在山上。
People guessed the reason caused the fire maybe someone left a butt in the mountain.
引起火灾的原因很多，有人为的疏忽，设备的老化，等等；
The fire caused by many reasons, It was for negligence aging equipment, etc.
介绍了剩余电流火灾报警系统的相关规范及适用范围，阐述了剩余电流引起火灾的原因。
The standards and application scopes of residual current alarming system were introduced. The causes that electrical current induced fire were put forth.
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