最近一次爆炸发生在7月4日，爆炸导致了煤气管道泄漏，而500米外，工人正在修补三天前的另一次袭击造成的破坏。
The latest bomb, on July 4th, caused a leak 500 metres from where workers were repairing damage from another attack three days earlier.
突然，新来的工人不小心切断了公司煤气供应的开关。
By accident, the new worker turned off the gas supply of the company.
工人们把人行道凿开埋煤气管道。
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