细菌以这种油为食，并释放硫化氢气体。
日本官员说，正是被释放的蒸汽包含的可燃氢气在接触到大气中的氧气后，导致了那次爆炸。
The venting process triggered the explosion when combustible hydrogen released by the steam mixed with oxygen in the air, officials said.
这种情况先出现在1号单元，随后3号单元出现了类似的情况。释放蒸汽后，当有东西点燃氢气时就发生了爆炸。
In both cases, that release was followed by an explosion when something sparked the hydrogen.
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