An asphyxiating mixture of gases, primarily nitrogen and carbon dioxide, left in a mine after a fire or an explosion.

爆后废气火灾或爆炸后，残留在矿井中的一种令人窒息的混合气体，主要含氮气和二氧化碳。

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Explosion can occur if the producer gas is mixed with sufficient amount of air to form explosive mixture.

如果可能会发生爆炸的天然气生产商与足够数量的空气混合形成爆炸性混合物。

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Can burn, vapor and air to form an explosive mixture, the explosion limit of 7%-73% (volume).

能燃烧，蒸气与空气形成爆炸性混合物，爆炸极限7% - 73%(体积)。

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There was a moment when there existed the danger of a nuclear explosion, and they had to get the water out from under the reactor, so that a mixture of uranium and graphite wouldn't get into it with the water they would have formed a critical mass.

NPR: 'Voices of Chernobyl': Survivors' Stories