an underground是什么意思 an underground怎么读
an underground的用法和样例
- An underground bed or layer of earth, gravel, or porous stone that yields water.
地下蓄水层，砂石含水层含有水的泥、砂砾或多孔石的地下河床或地层 - An underground defensive position with a fortified projection above ground level for gun emplacements.
掩蔽壕，地堡一个地下防御工事，有一个高干地面的，用来放枪的防御射击处 - There is an underground car park near the supermarket.
这个超市附近有一个地下停车场。 - The prisoner escaped by digging an underground tunnel.
囚犯挖了一条地道逃跑了。
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