事故也经常发生，爆炸把工具和武器的碎片抛向天空。
Almost as frequent were the accidents that sent shards of tools and weaponry exploding into the sky.
鞭炮经常发生爆炸事故，造成大量人员死伤。
Firecrackers often cause fire and explosion, killing and injuring many people.
由于煤炭资源特殊的生产环境，经常发生瓦斯爆炸、火灾等重大灾害，严重制约着煤矿安全的生产。
Because of the special production environment of coal resource, great accidents often take place such as the gas explosion, fire, etc. It badly restricts the production of the coal safety.
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