爆炸是由数袋甲烷气体着火引起的。
The blast was caused by pockets of methane gas that ignited.
把一小撮的盐投入壁炉中燃烧的火苗上，不仅能制造出相当可爱的黄色火焰，也可使烟囱里的灰轻易掉下来，预防烟囱着火并改善气体流通。
A handful of salt thrown onto the flames in your fireplace will not only produce pretty, vivid yellow flames, it will help loosen soot in the chimney, preventing chimney fires and improving air flow.
然后激光点燃了这位病人的气体，从而引起一场火灾，导致她的病号服和大腿着火。
It then caused the gas to ignite, sparking a fire, which set her hospital gown and legs ablaze.
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