The results have offered security guarantee condition when opencast working switches to underground working in the mine.

探测结果，为该矿由露天开采转入地下生产，提供了安全保障条件。

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However, exhaustions from the engine contain many harmful components which will harm the health of underground working staff.

但其发动机所排出的废气含有多种有害成分，会影响井下工人的健康。

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The temperature at underground working face is one of important factors that affect the selection of a mine ventilation design.

矿井井下气温高低是影响矿井通风方案选择的重要因素之一。

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The pasty was favoured by West Country miners who used the crimp as a handle to eat it while working underground.

BBC: World Pasty Championships start at Eden Project

Simon Fiorucci, 31, a physicist from Brown University, says working underground isn't that different from being in any other windowless lab.

WSJ: Physicists Look for Dark Matter Underground

Social researcher Wednesday Martin "caught wind of the underground network" while working on a book about practices among New York City's Park Avenue elite, the Post reported.

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