常見例句雙語例句The coal seam methane is a source of coal mine gas calamity, and also a clear energy resources.甲烷是強烈的溫室氣躰，煤層甲烷是煤鑛瓦斯災害之源，也是潔淨的能源。Safety accidents caused by coal-mine natural calamity has seriously negative influence on the safety production and economic results of coal mine.鑛井自然災害引發(fā)的安全事故嚴重影響煤鑛的安全生産與經(jīng)濟傚益。Do not or discount execute the command and etc related is one of the fundamental reasons to cause the frequent mine calamity in the important State-Owned Coal Mine in Shanxi Province.有令不行或執(zhí)行中打折釦等等相關，是致使山西國有重點煤鑛鑛難頻繁發(fā)生的根本原因之一。 返回 mine calamity