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Then there was the whole concept of coal mining, which is a culture unto itself, the most dangerous occupation in the world, and which draws and develops a certain kind of man.

其次是煤矿的整个概念，它本身就是一种文化，是世界上最危险的职业，它吸引和发展了某种人。

— Charles Martin Smith 查尔斯·马丁·史密斯