They dug a tunnel through the mountain.

他们在山中挖了一条地道。

The workers dig a tunnel through the mountain.

工人们挖了一条穿过山的隧道。

They built a tunnel to connect the two cities.

他们建了一条隧道来连接这两个城市。

They are digging a tunnel through the mountain.

他们正在挖掘一条穿过山的隧道。

This is a tunnel, watch out, there's a tunnel coming.

这是隧道，小心，有隧道来了。

What is it? It's a tunnel.

这是什么？这是一条隧道。

Like the inside of a tunnel.

像是隧道里。

A tunnel pierces the mountain.

一条隧道通过此山

Is a tunnel being dug there ?

一条隧道正在那里开凿是吗?。

They are digging out a tunnel.

他们正在挖一条地道。