The area has been mined for slate for centuries.

这个地区开采板岩有数百年了。

The coastal route had been mined.

沿海道路上布了地雷。

The UN convoy was mined on its way to the border.

联合国车队在驶往边界的途中触雷被炸。

The approaches to the garrison have been heavily mined.

通往卫戍区的路上布满了地雷。

The pit is being shut down because it no longer has enough coal that can be mined economically.

那个煤矿要关闭了，因为储量不足，难以经济开采。