The English language is constantly evolving， and there are a multitude of words out there that don’t mean what they used......

瓦斯涌出量是瓦斯防治与管理、矿井通风系统设计的重要基础数据,准确地预测瓦斯涌出量对于煤矿安全生产有着极其重要的指导意义与......