Britain has approved the first deep coal mine in 30 years, to supply coking coal to steelmakers.

英国已经批准30年来首个深井煤矿项目，向钢铁制造商供应焦煤。

4,000 meters down is the deepest part of the deepest mine on Earth, also located in South Africa.

地处南非的一个矿井堪称地球最深井——最深处达到了4000米深。

Britain's last deep coal mine closed in 2015.

英国最后一个深井煤矿于 2015 年关闭。

Like, the deepest mines are deeper than the tallest buildings.

就像，最深的地雷比最高的建筑物更深。

These no doubt, I thought, will never be discovered; the working of such deep mines would involve too large an outlay, and where would be the use as long as coal is yet spread far and wide near the surface?

我想，这些无疑永远不会被发现；开采如此深的矿井将需要巨大的费用，而且只要煤炭在地表附近广泛分布， 那又有什么用呢？