Owners drive into a room and shut their vehicle's engine off to prevent the risk of fire.

车主开车进入房间并关闭车辆的发动机以防止火灾风险。

And as it says here, the owners, they drive into a room and they shut their vehicles engine off to prevent the risk of fires.

正如它在这里所说的，车主们，他们开车进入一个房间， 并关闭他们的车辆引擎以防止发生火灾的风险。