And it turns out it's actually quite flammable. A hydrogen flame is very, very hot, but invisible.
而且，事实表明，氢气非常易燃，氢火焰极为炽热，但却是无形的。
Hydrogen and air mixtures, within the flammable range, can explode and may burn with a pale blue, almost invisible flame.
在可燃范围内的氢和空气的混合物可能爆炸，也可能燃烧，火焰是淡蓝色，几乎看不见。
Thermosetting materials in when heated usually decomposition out flammable gas, formed by the fire has certain prevent flame spreading ability carbonized layers, the carbonized depends on formula.
热固性材料在受热时通常分解出易燃气体，受火后形成具有一定的阻止火焰传播能力的炭化层，炭化程度取决于配方。
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