电线外套均套有金属防火管，有效阻止电池试验过程着火而燃烧的现象；
Electrical wire is sheathed in metal fire-retard tube, to prevent ignition caused by fire in battery test.
又比如防火是重要的事情，而救火是紧急的事情，如果不注意防火，就要常常救火。
And such as fire prevention is the important things, and fire is an urgent matter, if we do not pay attention to fire, will often fire.
三十几岁的心扉是防火的铁门，冷硬而结实，虽然热情的火不易烧开，柔情的水却能渗透。
In the thirties, it changes into a fire-proof iron door, cold and solid. Now it could not be easily burned through by the fire of passion, but could be infiltrated by the water of tenderness.
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