释放出来的气体中的氢气碰到火花，已经发生了爆炸，掀翻了建筑的屋顶，同时，又毁掉了本已经污染的整个系统。
There hydrogen in the released gas met a spark and exploded, blowing the roofs off the buildings but not, it seemed at the time, damaging the containment systems.
程中，有氢气和氧气以及酸雾逸出，不仅污染环境还具有危险性，维护时需要加水、加酸，已逐渐被市场淘汰。
Cheng, hydrogen and oxygen and acid mist escape, not only pollute the environment is also dangerous, and maintenance is needed to add water, acid, has been gradually eliminated by the market.
氢气可以取代乙炔、煤气、液化气等含碳气体，具有热值高、火焰集中、零污染，生产效率高，节能方便等优点。
Hydrogen can replace acetylene, gas, liquefied petroleum gases such as carbon, with high calorific value, flame concentration, zero pollution, high efficiency, energy saving and easy.
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