They are connected by underground passageway.

它们通过地下走廊连接。

youdao

Inside the tent was an opening to an underground passageway. They walked in the passageway for about 30 minutes before emerging on the other side.

帐篷里有个一个地下通道的入口，他们沿着这条地下通道走了大约半个小时才到达另外一端。

youdao

I was lost in this underground passageway, looking for the bin where all the travelers' trunks are stored. And Carl fed me a scrumptious biscuit and a cup of water.

我在地下走廊迷了路，卡尔给了我一块非常美味的饼干和一杯水。

youdao