以下为句子列表：
英文: Abstract: Satety charactcristics of the ventilation system in coal mine are analyzed.Indexes for the safety assessment of the ventilation system in coal mine are provided.Gradation of the safety degree for the ventilation system is also suggested.
中文: 文摘:分析了矿井(煤矿)通风系统的安全性，提出了评价矿井通风系统安全性的指标，确定了矿井通风系统安全性等级。
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英文: Induced Mutations of Varitety of High Yield of Flammulina Velutipes SOD by He-Ne Laser
中文: He-Ne激光对金针菇SOD高产株的诱变效应
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