例句
Copper has been mined here since the sixteenth century.
从16世纪起这里就开始开采铜矿。
This area has been mined for over 300 years.
这个地区采矿已经有300多年了。
Copper has been mined here since the sixteenth century.
从16世纪起这里就开始开采铜矿。
This area has been mined for over 300 years.
这个地区采矿已经有300多年了。