The initial explosion, we now know, involved hydrogen gas that had been leaking into the trench from a large hole in the vent pipe.
我们现在已经知道，初始爆炸是氢气泄漏到管道沟导致的。
There are also concerns that more victims may still be inside buildings hit by the initial massive explosion.
人们担心可能有更多的受害者仍然在受到强烈爆炸冲击的建筑物里面。
Guests at the hotel, including Britons, were moved from one place to another amid confusion as at least one explosion rocked the building after the initial gun attacks.
酒店的客人们，包括英国人，在骚乱中辗转，而开头的枪击后至少发生了一次震荡大楼的爆炸。
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