People get different kinds of materials from different mines. 人们从不同的矿井中得到不同的矿物材料。

　　Gold comes from a gold mine. 黄金产自金矿。

　　Copper comes from a copper mine. 铜产自铜矿。

　　And coal comes from a coal mine. 煤产自煤矿。

　　When people think of mines, they imagine a big mountain. 当人们想起矿井时，他们会想到一座大山。

　　However, some people find a big mine under the sea. 然而，有的人会在海底发现大矿井。

　　What is the oldest mine in history. 历史上最古老的矿井是哪个呢？

　　It is "Lion Cavern" in Southern Africa. 它就是非洲南部的“Lion Cavern”。

　　It is about 43,000 years old. 它约有43000年的历史。