The blast was caused by pockets of methane gas that ignited.
爆炸是由数袋甲烷气体着火引起的。
New drilling technology has unlocked two vast pockets of shale gas with recoverable reserves of about 70 trillion cubic feet (2 trillion cubic metres).
新的钻探技术开启了两个巨大的页岩油矿穴，还有70万亿立方英迟(2万亿立方米)的采储量。
With Eyjafjallajokull, pockets of hot gas blasted through the surface of the lava, generating shock waves that can be seen passing through the grey smoke of the volcano.
在埃亚非德拉火山爆发中，热气团冲破熔岩表面，产生的冲击波可以穿破灰色的火山灰烟尘。
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