underground

现在分词：

动词现在分词: undergrounding

更多词形：

动词过去式: undergrounded | 动词过去分词: undergrounded | 动词现在分词: undergrounding | 动词第三人称单数: undergrounds |

单词例句：

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

They were making a plan underground.

他们在秘密地策划。

The missile is delivered from underground.

这种导弹由地下发射。

The underground is quicker than the bus.

地下火车比公共汽车快。

They were suspected of underground activities.

他们被怀疑进行地下活动。

I wonder if I could have an underground map.

能给我一张地铁运行图吗?

This underground vault is theftproof.

这所地下保管库是防盗的。

The spy never told his family about his underground activities.

这位间谍从未把他的秘密活动告诉家里人。

We can find underground railways in many countries.

我们可以在许多国家中发现地下铁路。